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This site is such a fantastic one stop shop for IB Math Studies resources. I really appreciate the depth and variety of both materials and ideas offered. The materials that I have tried are thoughtful and engaging for students. I also like the dynamic...

Vern Cedarlund, Eugene, USA

I always check the InThinking site before any Maths Studies lesson to check for an exciting introduction to a topic or for extra resources. It has been invaluable for my teaching of this course, especially the links to videos on youtube and the worksheets....

Dorota Lipka, Sir James Henderson School, Italy

Well thought out and designed tasks. Easy navigation. Quality materials for deep learning across all topics. Regularly updated and new materials added. Responds to feedback. AMAZING TIME SAVER! Never without a quality lesson or idea for a class.

Melissa Griffin, Phuket International Academy Day School, Thailand

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Compound Interest

23 December 2018

So! I have been meaning to post something about this for a while. Please let me start with a disclaimer - I am only passing on what I have heard... more

This Years projects 2018

15 September 2018

I did this last year because I think that the more we hear about and share the 'ideas' behind internal assessments, the better we get at understanding... more

Subscriber comments


  • 9 Jan Doreen Erickson
    L, S & P Practice
    Hello, links to some answer keys missing or not working. Was looking at Sets in particular. Thank you.
  • 6 Jan Troy Harkin
    Curriculum Review and 2019
    Reviewing the site now as I look for material for revision.....thanks for the continuous updates Jim et all!
  • 16 Dec Jim Noble
    IB Core
    Hi Rosemary, Good questions. 1) Yes, it can all be done in French provided your school is set up accordingly. 2) Honestly, I don't know, but have put it on my list to find out since I know others have asked. Thanks, Jim
  • 10 Dec Rosemary Erskine
    IB Core
    I understand some mathematics diploma papers are available in French. Is it possible for students to take the Mathematics diploma exams in French? Could they therefore write the exploration IA in French? Do you know what resources/textbooks...
  • 20 Nov Jim Noble
    N & A Practice
    Hi Leslie - I will have a look and get back you, Thanks, Jim
  • 18 Nov Leslie Ricks
    N & A Practice
    Hello, I cannot find the answers for the More Financial Mathematics document. It says 'answers' but there is not an active link.
  • 8 Nov Amarjeet Singh
    Curriculum Review and 2019
    L'Hopital rule ,Eulers Method , Integrating Factor, Maclaurin series are all the addition to HL analysis and approaches. Do we have any elimination from the current course? Also any updates on HL paper 3 , Sorry Jim I am new to ThinkIb but...
  • 7 Nov Peter Karakiozis
    A project journey
    Thank you so much Jim for the explanatory notes on how to categorize numerical data. I have only discovered this site this year and reading through your notes, samples, examples has really helped me to have a better understanding of how to...
  • 6 Nov Jim Noble
    Focus - Chi Squared
    Hi William, I have sent you a mail! Thanks, Jim
  • 6 Nov William Hanna
    Focus - Chi Squared
    Please reply to me.
  • 6 Nov William Hanna
    Focus - Chi Squared
    Please please Release this subscription asap. Your check will be revived this week. Our wonderful IB Coordinator Mr. Sturgeon has worked very hard to get the check on time. I am using your website and need to continue my lecture and assignments. Thank...
  • 1 Nov Peter Karakiozis
    A project journey
    Thanks Jim.