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The ONLY 'O' Level Pure Bio Specialist In Singapore

We Bet We Can Make You Love Bio


3 Secrets To Go From FAILING to A1 in Level Pure Bio, PLUS What You'll Get As A Student Here!

(Signup/Trial Lesson)

Spots filled/Current capacity: 84/86 students.

NOTE: We accept students on a per-application basis only.


A Free Gift After You Apply: Our Crash Course Compilation!


Why You Can Trust In TBT:




Happy Parents & Students

7 in 10

Score Distinction


Score A1, A2 or B3

What Students Are Saying About ThatBioTutor:

The TBT Advantage

Why Bio Becomes So Fun and Easy For Our Students:

In-Depth Understanding: No More Feeling Lost!

Memory Shortcuts: Memorising Bio Becomes Easy

Answering Skills: Score Full Marks in OEQs

Student Benefits

TBT Is So Much More Than Bio Lessons...

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Save The Planet With Us!

Every month, ThatBioTutor donates a portion of our profits to contribute to global reforestation efforts through, founded by renowned YouTubers MrBeast and Mark Rober.

In honour of our students, we plant 1 tree for every student in our class each month. For instance, in May 2023, our class of 42 enthusiastic learners led to the planting of 42 trees:

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About The Tutor

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Keefe Fonseka is the founder and principal tutor at ThatBioTutor, which specialises in helping students sitting for O-Level Biology ace the subject, by equipping them with memorisation techniques, answering skills and exam-smart habits. He graduated from Raffles Junior College with all ‘A’s in the GCE A-Levels. He is currently pursuing a degree in Life Science (Biology) at the National University of Singapore, which has given him the NUS Merit Scholarship.


Frequently Asked Questions

Q: Do you teach physical lessons? 

Starting 2024, we now have the option of physical lessons! You choose between coming online or physically.

Q: Do I need to turn on my mic/camera during online class?

No need! Though I encourage students to respond to my questions via the zoom chat.

Q: Is there a lot of homework? 

The weekly homework consists of a few questions, and is highly manageable (I don't believe in overloading students with homework when they already have enough from school).

Homework is also not compulsory to do, although if you do it, you get rewards!

Q: How many students are there in a class?

The cap for physical class will be around 20-25 students. Don't be daunted by the numbers, try it out yourself in a trial lesson, and see why so many students still love our classes. 

Q: What levels do you teach?

Only the Sec 4 'O' level Pure Bio batch, so I can give my full undivided attention to their batch throughout the year. I may open a Sec 3 class in future.

Q: Do you teach combined bio?

At the moment, only Pure Bio.

Q: Do you teach 1-1 tuition?

No, I have too many students to afford the time to teach 1-1. Good news: Our students can ask me questions 1-1 on WhatsApp, 24/7!

Furthermore, you have the option to pay for weekly 1-1 coaching if you need it.

Q: But what if I can’t ask all the questions I want in a group class?

In my experience, my students never face this problem because they can ask me questions 24/7 on WhatsApp.


I even take the time to voice message them explanations if the question is more complex.

Q: Can I try just one lesson?

Yes! Trial lessons are the cost of 1 lesson. To apply for a trial lesson, fill in the form via the "Apply Here" button below.

Q: Can I know more about the class fees, timings, perks of being a student, etc?

All class details will be answered after you've filled in the application form! Hit the "Apply Here" button below.


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With the right help, bio is easy.

And it could even be your best subject.

If you'd like my help in making that a reality for you, apply by clicking the button below:

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