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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 also HIGHLY recommend this website! It has loads of great, ready-to-use resources. The website is easy to navigate and easy to find material. The activities are creative and meaningful, encouraging greater understanding of the topics. I've subscribed...

Hellen Phan, International School Augsburg-ISA-gGmbH, Germany

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

Subscriber comments


  • 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.
  • 30 Oct Jim Noble
    A project journey
    See above Peter for some suggested answers to your question. Thanks, Jim
  • 30 Oct Jim Noble
    A project journey
    Hi Peter, 1. Yes on the spreadsheet - and I don't recommend a particular site, but do like to see what sites they have used so I can ask them some questions about quality of data 2. For the chi squared test - this is a great question and of...
  • 29 Oct Peter Karakiozis
    A project journey
    Dear Jim, How would you conduct a chi squared test of Independence for Incarceration rates. What is the correct way to categorize numerical data? Is it a valid mathematical procedure?