InThinking Subject Sites
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Forthcoming Workshops
Mathematics: Application & Interpretation
IBDP Category 2
Berlin, Germany
23 to 25 August 2019
more info
Mathematics: Analysis and Approaches
IBDP Category 2
Berlin, Germany
23 to 25 August 2019
more info
Mathematics: Implementing the MYP curriculum
IBMYP Category 1
Berlin, Germany
8 to 10 November 2019
more info
Find all InThinking Workshops at www.inthinking.net
Site Author
Quote of the day
Many who have had an opportunity of knowing any more about mathematics confuse it with arithmetic, and consider it an arid science. In reality, however, it is a science which requires a great amount of imagination.
(Sofia Kovalevskaya, 18501891)
Resources
Textbooks for Mathematics HL and Mathematics SL
Textbooks for Math HL and Math SL. Two textbooks written by Tim Garry and Ibrahim Wazir that are fully revised 2nd editions providing comprehensive coverage for the new 2014 syllabuses. Each textbook comes with an ebook (accessed through a website) containing a complete digital copy of the text along with numerous additional material.
School visits
If you are interested in Tim Garry visiting your school to work with teachers and/or students, please contact us.
Home2Home
The vacation home exchange service for the IB community.
Feel at home when you travel the world.
www.home2homeinthinking.co.uk
Recommendationsmore
Tim's InThinking site has been invaluable to me as a new IB teacher. Before starting any new syllabus item, I use the site to gain a better understanding of the types of problems that my students need to be able to solve. It has helped me to format...
I love the "accessible" to "discriminating" levelled questions. They are great for differentiation in the classroom  especially as time in the IB classroom is so precious. Students start work at their own comfort level, discuss in...
The InThinking Maths website is a very beneficial and userfriendly online guide for IB teachers. You can get an answer to all of your questions. There are all sort of materials and support, many samples of course designs, explorations, exams, teaching...
Blogsee all
Euler's method on the TINspire
17 March 2019
As they say, a picture (or a video, in this case) is worth a thousand words. The video here shows one way to use the spreadsheet on the TINspire... more
what is path of midpoint of a falling ladder?
24 November 2018
Something which I think that is often not emphasized or valued enough when teaching mathematics is encouraging students to visualize a graph,... more
Subscriber comments

That's one of the tough aspects of IB maths exams  they are unpredictable. Which I think is a good thing, because it requires students to do some problem solving and strategizing  and not just answer routine familiar questions. There was...

Thanks. I'm just looking at what to include with my current HL cohort at the moment. I'd say box plots are fairly unlikely on a HL paper also, correct?

Hi Benson, It's possible there has been in the past, but personally I do not recall an exam question with a frequency histogram having unequal interval widths. It's the kind of thing that I cover if I have a little extra time b/c it can be...

Hi Tim, has there ever been a question on a HL paper about frequency density (ie histograms with unequal class interval widths)? I can't find any on Questionbank.

Sharma, The startofcourse assessment and algebra refreshers could certainly be used to help a teacher determine if a student is properly prepared to be successful at HL level.

Can we use this assesment and refreser for HL / SL selection

Sandra, There is certainly no need to cite every formula. Where I think it is important for a student to provide a citation is when they carry out some mathematical working that they did not completely figure out themselves. If they use an...

Thank you :) Another question... Does a student have to cite every formula he uses? Even if they were taught in the lesson or are in the booklet?I assumed not, but now I am not confident enough about that. Thank you!

Sandra, Good questions. Yes to both. Moderators expect to see written comments by teachers on the student Exploration providing some rationale for marks awarded for different criteria. Also, moderators like to see a checkmark next to students'...

Hi Tim, When marking the IAs, it's ok to have a summary in the document with the grade we gave to each descriptor and a brief explanation? Also can we leave comments throughout the IA? Thanks, Sandra

Krishnendu, Thank you for pointing out my error in the solution of SL Problem 143. I've corrected it and have uploaded a version 2 of the problem above. Thank you for your feedback.

Hello. In problem no. 143, the value of x cannot be 2.33 unit because in that case you will not be able to draw the triangle. ( 4+2.33 < 8 )