InThinking Subject Sites
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Forthcoming Workshops
Mathematics: Application & Interpretation
IBDP Category 2
Barcelona, Spain
7 to 9 February 2020
more info
Mathematics: Analysis and Approaches
IBDP Category 2
Barcelona, Spain
7 to 9 February 2020
more info
Mathematics: Application & Interpretation
IBDP Category 1
Barcelona, Spain
4 to 6 September 2020
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
I highly recommend any IB Mathematics teacher who is seeking expert guidance on how best to teach either Standard Level or Higher Level Mathematics in today's classroom to subscribe to the InThinking website. It is an invaluable resource for both...
Great site. Dense with great ideas and useful printable student material. It has added an extra dimension to my teaching and given me several successful plan B options. Well done Tim.
I highly recommend that HL teachers use your site. I am still amazed at all it has to offer. The wealth of material has made it so much easier for me to provide my students with problems that will help them learn any thing from the basics to accepting...
Blogsee all
new website ... it is coming
30 October 2019
I have put a few notices on this site over the past couple of months indicating that the new website for the new Analysis &... more
Problem: find exact ratio of areas
1 September 2019
Here is a problem that I thought up (probably has appeared somewhere before but I have not seen it) which is presented in the GeoGebra applet... more
Subscriber comments

Hakan, Thanks for finding this error. The correct answer to Q.8 in EXS_27(6) exercise set is approximately 1.29 (your answer). I've corrected the exercise set and uploaded it above (version 2). Thanks, Tim

Dear Tim, Is the answer of the question 8 x=1.29?I can't get x=1.75. Thanks Hakan

Hi Tim Do you have detailed IB Math SL or HL unit planners to share with us? Thanks Beena George

gud

Hi Suzhen, Yes, you are correct. I neglected to give the 2nd possible answer for angle ABC (two answers because it is an example of the ambiguous case). So, as you stated, two possible answers: 37.6 degrees or 142 degrees (3 significant figures)....

Hi Omneya, Thanks for the question. New site for the Analysis course will launch next week.

hi Tim when are you going to launch the new site for the AA ?

Hi, Tim. Q1 on 4 questions  ‘accessible’ to ‘discriminating’ should has two possible answer: 37.6 degree and 18037.6=142.4 degree.

Definitely. Thats what I though but I wanted to make sure.

Suzhen, Thank you for your feedback. You are correct, the answer to #8 on EXS_2530v1 should be 2, not 2. And, there is something incorrect for #7. I will make a correction soon and post it here. Thanks very much for pointing these out.

Jarrod, Excellent question. I was taught (and I teach my students) that whenever differentiating or integrating trigonometric functions then the functions must be evaluated using radians because radian measure is 'unitless' (it's just a ratio)...

Can you help in problem #160? When we plug in 60 degrees or pi/3 we get teh same answer for the first step. How do we know our answer is in radians/ hour and then have to convert?