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.

Sarah Jackson, Diocesan School for Girls, New Zealand

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.

Karin Hartog, D Y Patil International School, Belgium

These InThinking Biology activities are excellent! I was looking for something to break the monotony of a cells lesson so I tried the Cell types detective activity. Students loved it. Both the situation and the examples were brilliant

Amit Khanna, Jakarta Intercultural School, Indonesia

Blogsee all

Guiding students from plagiarism to research

3 May 2019

Sometimes a student will find an experiment online which is very similar to their own IA. They think this is a disaster, they are trying to... more

A fire breathing monster in the immune system?

3 March 2019

A new therapy which strengthens the power of a patient’s immune system to attack tumours is curing people of cancer. It is an exciting and... more

Subscriber comments

  • 24 May Eran Earland
    Introduction to Meiosis.
    I found the same issue. Link to key goes to home page
  • 22 May David Faure
    Alveoli & gas exchange
    Hi Marcy, I've checked all the references to the pneumocytes to be sure that they are correct. I can't find the typo you mention. Please could you check and let me know if you still find it, now. Best wishes, David
  • 22 May David Faure
    Alveoli & gas exchange
    Dear Marcy, Thanks for your comment, I have repaired the link to the Histology slides. Best wishes, David
  • Dear Laura, Yes there is a link to some model 'answers' for the A3 revsion worksheet in the left hand menu. Here is a direct link: Best wishes, David
  • 22 May David Faure
    Nine steps to an extended essay
    Dear Vici, Thanks for your comment. I've removed the reference to the abstract. You are right, the abstract is no longer required. If a student includes one, there is no penalty, but it does have to be included in the word count. Best wishes,...
  • 21 May Vici Mcknight
    Nine steps to an extended essay
    The abstract is no longer required...
  • 20 May laura Dos Santos
    Topic 1 - Cells revision activities
    Are there answers to the " A3 revision worksheet about the Cells topic" somewhere ?
  • 15 May Christoffer Plum
    Di-Hybrid Crosses.
    Activity 2, 5) says to work with the first cross from the table above. It should be the second cross as we have already done the first cross and the phenotypes pre-written is from cross 2.
  • 14 May Marcy Zicari
    Alveoli & gas exchange
    Also, the typos mentioned above are not yet fixed.
  • 14 May Marcy Zicari
    Alveoli & gas exchange
    The last link in the extra resources to the histology slides from trachea to alveoli is incorrect. It goes to a Seven Oaks school webpage.
  • 13 May Susanne Hirschberg
    Introduction to Cloning...
    Yes. It works again. Thanks for checking
  • 13 May Nick Hockings
    Enzyme Theory
    Same problem as well.