Discover our online tutors (Biology - Page 582 of 1732)

176,497 tutors available

Excellent ( 4.7 )

1.9 million student reviews

Our list of tutors

Joe

Glendale, United States (face to face & online)

Science teacher with 12 years experience in ib dp (college-level) biology, ap biology, chemistry, physical science, and science act prep.

£44,234/h
1^st lesson free

Amit

New Delhi, India (online)

Pgimer graduate let me help you to unruffle the domain of biology with ease.

£13,927/h
1^st lesson free

Manish

Hyderabad, India (online)

"expert tutor for science, medicine, and space exploration - achieve your learning goals!"

£7,737/h
1^st lesson free

Sampan

Hazaribagh, India (online)

A well scrutinized biology tutor not only explaining but visualising and understanding at the same time

£7,737/h
1^st lesson free

Urvashi

Amritsar, India (face to face & online)

5 (1 review)
New

Recently graduated and currently looking for an opportunity to teach the subject in the simplest way

£7,737/h
1^st lesson free

Deewanshi

Gorakhpur, India (online)

Are you passionate about biology?? join me and master the subject

£4,642/h
1^st lesson free

Anushka

Pune, India (online)

Enhance your biology knowledge with expert instruction from an experienced teacher online

£15,304/h
1^st lesson free

Gagan

Samraj, India (online)

B.tech graduate, love my subject and love to teach with joy and enthusiasm

£18,570/h
1^st lesson free

Arun

Rampur, India (face to face & online)

"adminstration assistance: efficiency managing task and ensuring smooth operation daily" be the future doctor's ️

£12,380/h
1^st lesson free

Simphiwe donald fikanoxolo

Alberton, South Africa (face to face & online)

• (educational programmes) tutoring grade 8-12 students (natural sciences, life sciences, english, agricultural sciences, tourism, geography and history.

£23,101/h
1^st lesson free

Poulomi

Hurlung, India (online)

A graduate and post-graduate of botany honours from jamshedpur women's college with first-class distinction. i have over 3-4 years of experience in teaching.

£7,737/h
1^st lesson free

Pallabi

Bishnupur, India (online)

Nursing graduate with 1 year clinical experience looking for a teaching job.

£15,475/h
1^st lesson free

Alice

Isle of Barra, United Kingdom (online)

Graduated from ucl with a degree in combined biological sciences. able to tutor up to and including a-level.

£30,152/h
1^st lesson free

Nirja

Oshawa, Canada (online)

I am a mcmaster health science student with over three years of tutoring experience. i tutor grades 4-12 in biology, general science, and english

£31,973/h
1^st lesson free

Dipanshi

Lucknow, India (face to face & online)

Hy this is dipanshi ,i am a student under graduation.i am good in zoology and genetics,i teach botany also and i like to teach biology inabout the anatomyalso

£13,757/h
1^st lesson free

Boxef

Nagpur, India (online)

I am bams student and join tha doubt export my profession doctor

£2,306/h
1^st lesson free

Tegan

Newbridge, United Kingdom (online)

Msci bioveterinary science graduate who has experience in tutoring gcse biology to year 10s and 11s

£50,253/h
1^st lesson free

Rati

Patiala, India (online)

Thapar university post graduate posses passion for learning and teaching biology and have experience of 8 years of teaching

£18,570/h
1^st lesson free

Nihalpura, India (face to face & online)

8 to 10 class students know anything in my biology class, in hindi

£12,380/h
1^st lesson free

Priyadarshi tiwari

Dum Dum, India (online)

Biology teacher since 2020. 84% in +2 i teach till class 10 biology

£10,832/h
1^st lesson free

Manav

Karnal, India (online)

Iam teaching ncert based biology to neet aspirant in a very easy way

£4,642/h
1^st lesson free

Paige

Appleton, United States (online)

Graduated from university of oshkosh- fox cities with a arts and science associate degree, passed with a's and i can aid in studying skills and understanding the complexity of these subjects

£16,219/h
1^st lesson free

Siouxsie

Huddersfield, United Kingdom (face to face & online)

Biomedical science bsc and medical microbiology msc graduate teaches biology and other sciences to all ages.

£18,091/h
1^st lesson free

Saundarya

Dhule, India (online)

A student teaching a student and making your dna up to date

£3,095/h
1^st lesson free

Meghan

Windsor, Canada (online)

Sl and hl biology teacher with 6+years teaching experience. i also have experience with middle school math and academic chemistry (grades 11 and 12).

£31,973/h
1^st lesson free

Madhurima

Guwahati, India (face to face & online)

I have got my degree on b.sc hence i am interested in teaching bio science subjects. i can bring out the best of students.

£9,285/h
1^st lesson free

Saranya

Kottayam, India (online)

Personal and easy going methodology. teaches all aspects in science with clear vision.

£3,095/h
1^st lesson free

Priyanshu

Noida, India (face to face & online)

For class upto 10 students main sub biology and science. chemistry and physics upto 8

£4,642/h
1^st lesson free

Manal

New York, United States (online)

Hello! with a master's degree in microbiology and a deep passion for biology. let me guide you through the wonders of biology in an interactive and effective learning environment.

£22,117/h
1^st lesson free

Jomol

Thiruvananthapuram, India (online)

Iam a biology teacher and also i will teach like your mother.iam inviting all my students requests , hope you all are like me my biology classes are very meaningful and understanding one thankyou.

£13,943/h
1^st lesson free

Ayisha

Koduvally, India (online)

Make your biology studies more easy.teaches you in a simple way for all the levels.

£7,737/h
1^st lesson free

Sanaa

London, United Kingdom (online)

5 (1 review)
New

Undergraduate pharmacy student. teaching biology at gcse and a level, with 2 years' experience. teaching technique according to students' preferences.

£22,111/h
1^st lesson free

Ruchitha

Hyderabad, India (online)

Law student who has an immense interest in science.was an science student until 12 th studying botany and zoology .i am an experienced person in these subjects along with my constant researching.biote

£15,475/h
1^st lesson free

Aparna

Thathappilly, India (online)

I'm a b.sc microbiology graduate. i love to teach and i will teach well

£3,869/h
1^st lesson free

Shweta

Mandi, India (online)

Here the most easily i will you life time study. and i wish you could live my teaching

£7,737/h
1^st lesson free

Nikhil

Bhiwani, India (face to face & online)

Well educated with good skills and experience. ready to teach in an effective way.

£11,606/h
1^st lesson free

Jonathan

Eugene, United States (online)

Master's of science graduate specializing in sciences ready to help you succeed!

£29,489/h
1^st lesson free

Jey

Dindigul, India (online)

Studying is a game.... try to solve.... like your game. bio is our life...

£4,642/h
1^st lesson free

Tola

London, United Kingdom (online)

5 (1 review)
New

Aaa* (a-level biology, chemistry, maths) medical student two years of professional tutoring experience ucat mentoring and a-level biology tutor

£30,152/h
1^st lesson free

Danny

Los Angeles, United States (online)

I am an undergraduate at boston university majoring in cellular molecular biology and genetics

£29,489/h
1^st lesson free

Mhd

Othayi, India (online)

Iam a biology teacher with two year experience and i take classe for neet students and you also understand my class easily and make sure your score in biology is full i guarantee f

£7,737/h
1^st lesson free

Surabhi

Kottayam, India (face to face & online)

Friendly teaching with communication,easy way to understand with examples.weekly exams and practice.each month give new topic and discussion

£4,642/h
1^st lesson free

Nanda

Thrissur, India (online)

Postgraduate student. strengthening the weakest academic area. flexible scheduling. free demo classes .

£12,380/h
1^st lesson free

Sunil

Karnal, India (face to face & online)

Biology is easy and very interesting if you follow me... connect and learn

£2,306/h
1^st lesson free

Siddi

Dr. Ambedkar Nagar, India (online)

Do not learn biology, understand it , lets understand easily without much effort.

£13,927/h
1^st lesson free

Aaradhya

Munger, India (face to face & online)

5 (1 review)
New

Graduate loves biology, and will make you love biology lets go ️

£15,475/h
1^st lesson free

Gemmalyn

Sisseton, United States (online)

I am graduate of bachelor of science in nursing and secondary education major in biology. i have been teaching for the past 9 years. i've developed my own materials and can personalized tutorials acco

£29,489/h
1^st lesson free

Dehradun, India (online)

Graduate and currently doing masters in zoology and can teach the basic biology with clearing concepts .

£7,737/h
1^st lesson free

Jasleen

Kharar, India (online)

Biology classes by a postgraduate doctor with best assignmnets and test papers

£9,285/h
1^st lesson free

Arya

Kota, India (face to face & online)

Hi,prepping for neet myself. english and biology are my strongest. feel free to contact.

£7,737/h
1^st lesson free

Pratyasha

Dhenkanal, India (online)

Study by fun with pratyasha in less amount of money with clarity

£2,306/h
1^st lesson free

Priyotush

Silchar, India (face to face & online)

I am an mbbs 4th year student.i teaches biology and physics for neet examination

£15,475/h
1^st lesson free

Thanjavur, India (face to face & online)

Biochemistryteacher with ample experience in teaching biotechnology, microbiology, molecular biology, lab technology and all life sciences

£7,737/h
1^st lesson free

Snigdha

Howrah, India (face to face & online)

Teaching biology, zoology, botany. i will teach you briefly and i will prepare you for your next exam.

£7,737/h
1^st lesson free

Anran

London, United Kingdom (online)

Biomedical sciences graduate from ucl, teaches biology and research writing for gcse and a level in london

£30,152/h
1^st lesson free

Sahibzada Ajit Singh Nagar, India (face to face & online)

Hi, i'm a passionate and experienced biology tutor dedicated to helping students succeed in biology. with my guidance, you'll gain a deeper understanding of biological concepts, improve your grades, a

£8,867/h
1^st lesson free

James

Swindon, United Kingdom (face to face & online)

Advanced clinical practitioner a level biology double award gcse health and social care expert

£80,405/h
1^st lesson free

Visesh

Purulia, India (face to face & online)

Easy going tutor with a passion for biology who understands students' psyche and teaches in student friendly language with emphasis on understanding the basics.

£12,380/h
1^st lesson free

Kavya

New Delhi, India (face to face & online)

I have just completed my 12th this year. i am enthusiastic about sharing my knowledge and expertise through tutoring. i find great satisfaction in helping others understand complex concepts and achiev

£13,927/h
1^st lesson free

Aradhay

Varanasi, India (online)

A class 12 passed topper with good teaching skills and an enthusiast teacher

£2,306/h
1^st lesson free

Shenaya

Subang Jaya, Malaysia (face to face & online)

Well versed in the subjects related to biology, currently pursuing my last year in biomedical science (honors).

£14,592/h
1^st lesson free

Mrityunjay

New Delhi, India (face to face & online)

Biology teacher for clasess 6th to 10th, for class 9 and 10 its science i.e physics chem biology.

£10,832/h
1^st lesson free

Gunjan

Bhopal, India (online)

Pursuing phd in drug designing and delivery and teaches biology in school.

£12,380/h
1^st lesson free

Vaishnavi

Rona, India (online)

Learn anatomy with dr.vaishnavi human anatomy will be covered with proper diagram and handwritten notes

£13,927/h
1^st lesson free

Rishikesh

Ranisagar, India (online)

Come and join to learn because learning is everything conscious for you

£7,737/h
1^st lesson free

Aryan

Jaipur, India (face to face & online)

I'm a passionate neet aspirant with a significant score improvement 560/720 in neet 2023 to 622/720 in 2024 and a deep understanding of physics, chemistry, and biology.

£4,642/h
1^st lesson free

Mary

Brantford, Canada (face to face & online)

Elementary and highschool biology tutor available – enhance your understanding and achieve academic success!

£21,315/h
1^st lesson free

Vino

Madurai, India (face to face & online)

Qualified medical entrance called neet with perfectscore in biology.i will make you fall in love with the concept with my indepth knowledge.do join and have fun learning!

£13,711/h
1^st lesson free

Nagarajan mahanya

Nagercoil, India (online)

Science teacher easy teaching methodlogy easily understand subject knowledge and unforgettable theory

£13,896/h
1^st lesson free

Rena

Birmingham, United Kingdom (online)

Achieved grade 9 in gcse biology, personalised classes to tailor to your needs!

£30,152/h
1^st lesson free

Kushagra

Kanpur, India (online)

"master biology with expert tutoring: unlock your potential today!" study now thanks

£12,380/h
1^st lesson free

Sanobar

Nyori, India (online)

Enhance your biology understanding with a seasoned expert! over 3 years of experience specializing in biology for comprehensive learning and academic success."

£10,059/h
1^st lesson free

Mehak gopta

Shimla, India (online)

12th - medical graduation - zoology major b.ed degree degree in biology o

£7,737/h
1^st lesson free

Prince

Kota, India (face to face & online)

Unlocking the wonders of life: journeying through biology with a passionate educator

£6,190/h
1^st lesson free

Anmol

Babhandih, India (online)

Dedicated biology teacher with a proven record of 90% progress rate in middle school.

£5,416/h
1^st lesson free

Luana maria

Urbana, United States (online)

Phd student from university of illinois urbana-champaign, teaches science and biology for all levels. personalized method to meet your individual needs.

£14,745/h
1^st lesson free

Alyana

Cannock, United Kingdom (online)

Hi there! my name is alyana and i am a 4th year medical student. as i am now on hospital placement i hope to use my spare time to tutor gcse and a level students in mainly; chemistry, biology and psyc

£70,354/h
1^st lesson free

Mohd

Roorkee, India (face to face & online)

I completed my intermediate from science stream. currently doing my graduation from aligarh muslim university. i'm very passionate in teaching.

£13,711/h
1^st lesson free

Aaliyah

Chigwell, United Kingdom (online)

Graduate in biology with gsce and a level qualifications and fully passionate about the subject looking to build experience with online tutoring

£40,203/h
1^st lesson free

Shreyansh

South 24 Parganas, India (online)

Biology teacher for class v-xii . specially for boards and neet. mbbs (jimsh)

£9,269/h
1^st lesson free

Danswrang

Kokrajhar, India (face to face & online)

Msc.in zoology from tripura university can teach from class 5 to 12.

£6,190/h
1^st lesson free

Faiz

New Delhi, India (face to face & online)

Tuttu classes bio baba get the best bio class 9th and 10th students only

£2,306/h
1^st lesson free

Miss anakha

Kanadiya, India (online)

Medical student looking for tutoring students online, great at communicating and clearing concepts.

£13,927/h
1^st lesson free

Khushi

Ghaziabad, India (online)

Hiee ,thank you for visiting! let's unlock your maximum potential in biology.

£5,416/h
1^st lesson free

Dibyanjali prusty

Bhubaneswar, India (face to face & online)

Study hard & keep growing.... without knowledge life is nothing so be serious & focus on study..

£13,927/h
1^st lesson free

Dinesh

Thoothukudi, India (online)

I am a phd scholar and i teach english, mathematics, physics, chemistry and biology at secondary school level

£7,737/h
1^st lesson free

Vibha

Agra, India (face to face & online)

Phd scholar who loves teaching biology and have prior experience in biology with easy going tricks and methodology

£15,475/h
1^st lesson free

Gerardo

Greater Sudbury, Canada (face to face & online)

Biotechnologist, biologist, m.sc. biochemistry, molecular biology phd student with experience teaching in the biology field (biology and related areas) in high school and bachelor's. sudbury or online

£15,986/h
1^st lesson free

Prabhdeep

Chandigarh, India (online)

I have 4 yrs of teaching experience regarding my subject (biology)….i am good in making the conceptss clear and finding the way to make the students learn it in more fineand easy manner

£15,475/h
1^st lesson free

Melissa

Fredericton, Canada (online)

Forestry and environmental scientist able to teach biology, environmental management, and forestry lessons from home.

£15,986/h
1^st lesson free

Sufiya

Jodhpur, India (face to face & online)

Science teacher, biology teachers work in middle schools or high schools, helping students learn about the origin, distribution, structure, and function of all living organisms.

£13,927/h
1^st lesson free

Rishi

Nagapattinam, India (online)

Medical graduate and teaching by interest . one on one personalized care given

£2,306/h
1^st lesson free

Rohit

Mumbai, India (online)

2nd yearmbbsstudent,can help you with finding new ways to study biology

£7,737/h
1^st lesson free

Daniela

Moorestown, United States (face to face & online)

Hello! i am currently a college student majoring in biology, and would love to help out anyone who needs to brush up their science skills!

£16,219/h
1^st lesson free

Puja

Ongole, India (online)

Will teach biology in easy way and easy way methodology science teacher

£3,869/h
1^st lesson free

Isha

Chandigarh, India (face to face & online)

Ignou graduate. loves to teach. easy methodology for studies. friendly. love for biology

£13,927/h
1^st lesson free

Kalyani

Buldana, India (online)

Hii i am your biology teacher i will teach you how life form

£12,380/h
1^st lesson free

Kamakshi

Rajnandgaon, India (online)

A student who can teach biology concepts by heart in a fun way for all hardworking students.

£7,737/h
1^st lesson free

Will

Broomall, United States (online)

Psu neuroscience and biology graduate. can help with microbiology, cell biology, neurobiology, and some biochemistry

£17,693/h
1^st lesson free

Swati

Galway, Ireland (face to face & online)

5 (1 review)
New

Master biology concepts with personalized tutoring! graduation in biotechnology and postgraduation in microbiology, experienced tutor with 4+ years of experience teaching students at all levels.

£34,413/h
1^st lesson free

Lydia

Dallas, United States (online)

Doctoral health care professional teaches anatomy and health sciences from high school to college level virtually.

£147,445/h
1^st lesson free

Mili

Bhagalpur, India (face to face & online)

Top-notch mbbs coaching: excel in exams with expert guidance and personalized support

£9,285/h
1^st lesson free

Essential information about your Biology lesson
✅ Average price:	£15,494/h
✅ Average response time:	1h
✅ Tutors available:	176,497
✅ Lesson format:	Face-to-face or online

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Discover our online tutors (Biology - Page 582 of 1732)

176,497 tutors available

Our list of tutors

Science teacher with 12 years experience in ib dp (college-level) biology, ap biology, chemistry, physical science, and science act prep.

Pgimer graduate let me help you to unruffle the domain of biology with ease.

"expert tutor for science, medicine, and space exploration - achieve your learning goals!"

A well scrutinized biology tutor not only explaining but visualising and understanding at the same time

Recently graduated and currently looking for an opportunity to teach the subject in the simplest way

Are you passionate about biology?? join me and master the subject

Enhance your biology knowledge with expert instruction from an experienced teacher online

B.tech graduate, love my subject and love to teach with joy and enthusiasm

"adminstration assistance: efficiency managing task and ensuring smooth operation daily" be the future doctor's ️

• (educational programmes) tutoring grade 8-12 students (natural sciences, life sciences, english, agricultural sciences, tourism, geography and history.

A graduate and post-graduate of botany honours from jamshedpur women's college with first-class distinction. i have over 3-4 years of experience in teaching.

Nursing graduate with 1 year clinical experience looking for a teaching job.

Graduated from ucl with a degree in combined biological sciences. able to tutor up to and including a-level.

I am a mcmaster health science student with over three years of tutoring experience. i tutor grades 4-12 in biology, general science, and english

Hy this is dipanshi ,i am a student under graduation.i am good in zoology and genetics,i teach botany also and i like to teach biology inabout the anatomyalso

I am bams student and join tha doubt export my profession doctor

Msci bioveterinary science graduate who has experience in tutoring gcse biology to year 10s and 11s

Thapar university post graduate posses passion for learning and teaching biology and have experience of 8 years of teaching

8 to 10 class students know anything in my biology class, in hindi

Biology teacher since 2020. 84% in +2 i teach till class 10 biology

Iam teaching ncert based biology to neet aspirant in a very easy way

Graduated from university of oshkosh- fox cities with a arts and science associate degree, passed with a's and i can aid in studying skills and understanding the complexity of these subjects

Biomedical science bsc and medical microbiology msc graduate teaches biology and other sciences to all ages.

A student teaching a student and making your dna up to date

Sl and hl biology teacher with 6+years teaching experience. i also have experience with middle school math and academic chemistry (grades 11 and 12).

I have got my degree on b.sc hence i am interested in teaching bio science subjects. i can bring out the best of students.

Personal and easy going methodology. teaches all aspects in science with clear vision.

For class upto 10 students main sub biology and science. chemistry and physics upto 8

Hello! with a master's degree in microbiology and a deep passion for biology. let me guide you through the wonders of biology in an interactive and effective learning environment.

Iam a biology teacher and also i will teach like your mother.iam inviting all my students requests , hope you all are like me my biology classes are very meaningful and understanding one thankyou.

Make your biology studies more easy.teaches you in a simple way for all the levels.

Undergraduate pharmacy student. teaching biology at gcse and a level, with 2 years' experience. teaching technique according to students' preferences.

Law student who has an immense interest in science.was an science student until 12 th studying botany and zoology .i am an experienced person in these subjects along with my constant researching.biote

I'm a b.sc microbiology graduate. i love to teach and i will teach well

Here the most easily i will you life time study. and i wish you could live my teaching

Well educated with good skills and experience. ready to teach in an effective way.

Master's of science graduate specializing in sciences ready to help you succeed!

Studying is a game.... try to solve.... like your game. bio is our life...

A*a*a* (a-level biology, chemistry, maths) medical student two years of professional tutoring experience ucat mentoring and a-level biology tutor

I am an undergraduate at boston university majoring in cellular molecular biology and genetics

Iam a biology teacher with two year experience and i take classe for neet students and you also understand my class easily and make sure your score in biology is full i guarantee f

Friendly teaching with communication,easy way to understand with examples.weekly exams and practice.each month give new topic and discussion

Postgraduate student. strengthening the weakest academic area. flexible scheduling. free demo classes .

Biology is easy and very interesting if you follow me... connect and learn

Do not learn biology, understand it , lets understand easily without much effort.

Graduate loves biology, and will make you love biology lets go ️

I am graduate of bachelor of science in nursing and secondary education major in biology. i have been teaching for the past 9 years. i've developed my own materials and can personalized tutorials acco

Graduate and currently doing masters in zoology and can teach the basic biology with clearing concepts .

Biology classes by a postgraduate doctor with best assignmnets and test papers

Hi,prepping for neet myself. english and biology are my strongest. feel free to contact.

Study by fun with pratyasha in less amount of money with clarity

I am an mbbs 4th year student.i teaches biology and physics for neet examination

Biochemistryteacher with ample experience in teaching biotechnology, microbiology, molecular biology, lab technology and all life sciences

Teaching biology, zoology, botany. i will teach you briefly and i will prepare you for your next exam.

Biomedical sciences graduate from ucl, teaches biology and research writing for gcse and a level in london

Hi, i'm a passionate and experienced biology tutor dedicated to helping students succeed in biology. with my guidance, you'll gain a deeper understanding of biological concepts, improve your grades, a

Advanced clinical practitioner a level biology double award gcse health and social care expert

Easy going tutor with a passion for biology who understands students' psyche and teaches in student friendly language with emphasis on understanding the basics.

I have just completed my 12th this year. i am enthusiastic about sharing my knowledge and expertise through tutoring. i find great satisfaction in helping others understand complex concepts and achiev

A class 12 passed topper with good teaching skills and an enthusiast teacher

Well versed in the subjects related to biology, currently pursuing my last year in biomedical science (honors).

Biology teacher for clasess 6th to 10th, for class 9 and 10 its science i.e physics chem biology.

Pursuing phd in drug designing and delivery and teaches biology in school.

Learn anatomy with dr.vaishnavi human anatomy will be covered with proper diagram and handwritten notes

Come and join to learn because learning is everything conscious for you

I'm a passionate neet aspirant with a significant score improvement 560/720 in neet 2023 to 622/720 in 2024 and a deep understanding of physics, chemistry, and biology.

Elementary and highschool biology tutor available – enhance your understanding and achieve academic success!

Qualified medical entrance called neet with perfectscore in biology.i will make you fall in love with the concept with my indepth knowledge.do join and have fun learning!

Science teacher easy teaching methodlogy easily understand subject knowledge and unforgettable theory

Achieved grade 9 in gcse biology, personalised classes to tailor to your needs!

"master biology with expert tutoring: unlock your potential today!" study now thanks

Enhance your biology understanding with a seasoned expert! over 3 years of experience specializing in biology for comprehensive learning and academic success."

12th - medical graduation - zoology major b.ed degree degree in biology o

Unlocking the wonders of life: journeying through biology with a passionate educator

Dedicated biology teacher with a proven record of 90% progress rate in middle school.

Phd student from university of illinois urbana-champaign, teaches science and biology for all levels. personalized method to meet your individual needs.

Hi there! my name is alyana and i am a 4th year medical student. as i am now on hospital placement i hope to use my spare time to tutor gcse and a level students in mainly; chemistry, biology and psyc

Aaa* (a-level biology, chemistry, maths) medical student two years of professional tutoring experience ucat mentoring and a-level biology tutor