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Incredibly useful resource site - has probably saved me hundreds of hours planning. Plenty of links, worksheets and interactive resources that support the new IB course.

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If you are looking for a reliable source to help you plan and teach the new IBDP Biology course, this website is a must.

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This year is my first year teaching IB Biology. The InThinking Biology site has proven to be immensely valuable to the quality and delivery of my lessons.

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Online tools #2 - Quizlet live

Saturday 4 February 2017

It's the time of the year when students need guidance about exam tecnhique. In particular reminders about the exact meaning of the command terms.... more

Online tools #1- Kahoot

Saturday 7 January 2017

Kahoot is a great free online tool for formative assessment or just for a bit of fun at the end of a lesson.Students could make their own quizes... more

It's easier to talk while holding a model

Sunday 18 December 2016

Students often have trouble explaining biological process, especially when the parts are invisibly small. Why do students get stuck with Osmosis,... more

Subscriber comments


  • Any suggested answers for the role play or competitive/non-competitive inhibitor worksheet?
  • Hi, The last image on "Activity 3 - Take a look at light" is very low resolution. Looks like the thumbnail only got copied.
  • 23 Feb Rebecca Patrick
    Activation energy and enzyme pathways
    Hi David, I also cannot get that link to work, the popup opens but then nothing happens. Does is require a specific program? Thank you!
  • 23 Feb Janet Anderson
    Di-Hybrid Crosses.
    If short bristles are dominant, shouldn't the chart be :Curled wings long bristles 20 and Curled wings short bristles 60? Please advise as it has become an issue in my class
  • 23 Feb Janet Anderson
    Di hybrid crosses - model answers
    If short bristles are dominant, shouldn't the chart be :Curled wings long bristles 20 and Curled wings short bristles 60? Please advise as it has become an issue in my class
  • 23 Feb Arnaz Ranji Charna
    Molecular biology test SL
    Dear David, In the extension questions, question 2 (Photosynthesis rates), I can not see the apparatus figure even though the question mentions that the apparatus is shown below. I was wondering if there was a figure that accompanies this question....
  • 23 Feb Gord Lemon
    Blood and Blood Vessels.
    Hi David - I'm wondering if activity 3 is necessary as I can't find a syllabus point relating to blood composition? (although it makes sense they should have know it, this is just so much to cover already!)
  • 22 Feb Heather Sherman
    Ecological terms.
    The link to the British Ecological Society doesn't work
  • Hi David, Do you have a timeline on when you will finish the learning activities for Option C? Thanks.
  • 20 Feb David Faure
    Control of digestive secretions
    Hi Ysabel, Thanks for your comment, I'm teaching this lesson today, I'll try to get some model answers on the site by tomorrow. Best wishes, David
  • 20 Feb Michelle Lee
    Translation & ribosomes
    Hi David, for activity 2, Q4 of the second set of questions. Should it read RNA instead of DNA or am I misinterpreting the question? Thanks!
  • 19 Feb Janice Williams
    Exocrine glands
    Hi David, On the link on slide 3 I am asked for editor's access? Could this be changed please?