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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

This site has everything you need to supplement your course: notes, exam prep, IA tips, and activities. What I most love about this site is that the activities are all ready to go - the handouts, answers, and resources are all there for you. Not only...

Valerie Koch, International School of Zug and Lucern, Switzerland

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

 Blogmore

Percentage perception

Wednesday 14 December 2016

Many of you will have seen the activity on Percentage Perception and how it is used to explore data on our perception of how many people where... more

Picture this

Thursday 1 September 2016

Just sharing what I did today with one of my Mathematical Studies classes as a warm up exercise for the new term. We played a few rounds of... more

IB Americas

Sunday 31 July 2016

So I was lucky enough to be taken to the IB Americas conference with the 'inthinking' team a couple of weeks ago. We went to man an exhibition... more

Subscriber comments


  • 20 Feb Mark Rolland
    Cuboid Challenge
    (thanks for the fun idea)
  • 20 Feb Mark Rolland
    Cuboid Challenge
    It would be good to have an answer on how to do this
  • 13 Feb Danny Crescenti
    Statistics Teaching Ideas
    Hey there, Is it possible to get this activities broken town by topic number? 2.1, 2.2, etc. Or perhaps separated by descriptive vs. two variable stats? I know this is nitpicky, but it'd be nice to be able to find a resource in a second when...
  • 30 Jan Jim Noble
    Project Problems
    Hi Grant - No, not holding them back at all in my opinion, a student is held back if their information does not have potential for different avenues. If a candidate has their hopes pinned on using chi² for a further process then they should...
  • 27 Jan Grant Fossum
    Project Problems
    Jim, I agree with you completely, but I guess I am concerned then about the grading from IB. If I don't encourage this from my students am I holding them back? Where all would they take the points, probably from process (not including all...
  • 23 Jan Jim Noble
    Project Problems
    Thanks Grant - Personally I think that is not a great - and like I suggest in the blog, I question the validity of that and would begin to think of it as irrelevant. The key issue is that students want to get credit for a further process and...
  • 23 Jan Jim Noble
    Marked Projects
    Absolutely agree Grant - I think that is a very useful activity. I have written about it a bit here and have a couple of favourites. I often make use of this adatbase for a practice project - and like to develop this one as a modelling example......
  • 23 Jan Jim Noble
    Homicide Rates
    Hi Ken - Absolutely correct about raw data. It was included, but I haven't put it here. I'll amend that. Its a key point though and when students organise large amounts of data in a spreadsheet, it is easy for them/us to forget and then it...
  • 20 Jan Ken Stirrat
    Homicide Rates
    Hi Jim, Thanks for the additional material on the IA, very helpful. I also liked this IA, clearly a student enjoying their work. Just a quick question on B. As there is no raw data included, would this limit the candidate to a 1 ? ,,,and what...
  • 19 Jan Grant Fossum
    Marked Projects
    Thank you so much for adding these, it is great to have some new examples to look at. I love this site, but I do have an idea for consideration and I am trying to do as well. I think it would help to do a "fake" IA with students with pre-defined...
  • 19 Jan Grant Fossum
    Project Problems
    Hey Jim, So I love the blog, and my thinking is like yours; however I think that contradicts the IBO. In the examples they give if the r is low, they use chi. What do you advise students to do if their correlation coefficient is low? Here...
  • 19 Jan Jim Noble
    Marking & Moderation
    Great - always good to hear. I do use it every year!