​​​​Organic Chemistry Tutoring by Dr Mark Coster

OChem - where career dreams die?

Have you tried and tried to understand Organic Chemistry, but it still just doesn't make sense? Are you worried your career dreams are going to die on the shores of Lake OChem? Organic Chemistry has an undeserved reputation as being tough - some even call it the Weed out course. But, in my experience, it's not that Organic Chemistry is inherently harder than other subjects, but just that it's different to what you may be more comfortable with, and all you need is a guide to help things click.

Organic Chemistry Tutoring - Online with Dr. Mark Coster

Why would you want to hire me as your organic chemistry tutor? Good question, and I'm glad you asked! For over 15 years, I've been teaching Organic Chemistry to students from 1st year to graduate students at The University of Sydney (2003-7) and Griffith University (2007-18). You can read all about me here, but suffice to say that I've been obsessed with organic chemistry for 20+ years, did my PhD in this area at the University of Cambridge and have taught well over 2,000 undergraduate students. I know what kinds questions you will face and what tricks your Professor will throw into the exam, because I've been writing organic chemistry exam questions for years! 

Mark's teaching style

Helped me step back... and figure out different ways to approach problems

In my experience, he has not only helped me solve problems by giving me tips and answering my questions but helped me step back with each problem and figure out different ways to approach problems. Thank you!

Susana Garcia

Highly recommend!

Mark has incredible knowledge of organic chemistry and has a clear, articulate and enjoyable teaching style that would benefit any organic chemistry student. Highly recommend!

Andrew Pearson

Muito obregado!

His positive attitude and passion for mentoring / helping.

Good for IB HL as well as college students. Muito obregado!

Doug Abshire

Good logical communicator

Easy to understand. Good logical communicator making sure the student really learns.

Claire Joy

My tutoring - what to expect

I use Zoom video-conferencing software - it's super easy to use! When you book your tutoring session, you get a link to click and you can join the session from any device - desktop PC, Mac, laptop, iPad, tablet or even your phone. My students are constantly amazed at how much it is just like being in the same room as each other!

I screen share whatever I draw using a stylus and tablet. You can screen share, send photos of your work, hold paper in front of the webcam,.. or whatever suits you best! I record every tutoring session and make the video privately available to you, and I also send you a PDF of notes from the session - so, you can go back and revise anything we covered.

Pocket Professor

Direct communication

You can communicate directly with me via the online collaboration tool, Slack. After you sign up for your first tutoring session, you'll be invited to my Slack workspace where you can drop me a message any time. Ask a quick question, prepare for a tutoring session or share your successes and struggles! Slack makes it super easy to share attachments, links, photos (eg. a textbook problem or class notes) and works seamlessly on mobile, desktop and tablet.

Video tutorials

My video tutorials are growing and can give you an idea of my teaching style:

What was most useful about Mark's Help?

Mark helps students, such as me, to do critical thinking about problems

Mark helps students, such as me, to do critical thinking about problems and how to approach them... Thank you!

Susana Garcia

His explanation was exactly how I needed it explained

Mark's help was very systematic. Perfect way of explaining something I was finding tricky. His explanation was exactly how I needed it explained as well.

Claire Joy

The different ways he will try to explain things!

The different ways he will try to explain things! It is really helpful how he tries to see things through multiple points of view.

Kaitlin Brady


Do you study outside 'normal' working hours? Great! Timezone differences mean I'm available at times that other tutors are not.


Web-conferencing and screen-sharing software makes it just like being in the same room. You won't even need to leave home!


You'll have my >20 years OChem experience at your disposal, and I can tell you exactly the kinds of exam tricks to expect from your professor!

Get to your 'Aha!' moment

Turns out, most students study organic chemistry all wrong. To make matters worse, most teaching staff and tutors don't know any better. I can help you get to your 'aha!' moments by working through your course material with you, and showing you the best, scientifically-proven methods to deeply learn Organic Chemistry. I'll guide you through exam-style questions, explaining how to tackle even the most challenging Organic Chemistry exam questions - you'll walk into your exam with confidence! Even better, these methods are entirely transferable to the rest of your studies.

Rates and bookings

My current rate is $70 per hour, regardless of day of the week or time of the day. You can book tutoring sessions straight into my calendar at times that suit you best. No emailing back and forth! You'll see every slot I have available.


The sooner you start working with me, the more confident you'll be in your Organic Chemistry exam, and the better your result will be!

Click the button below to book your first tutoring session with me.