InThinking Subject Sites
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Disclaimer: InThinking subject sites are neither endorsed by nor connected with the International Baccalaureate Organisation.
New German A: Lang & Lit website
InThinking is pleased to announce the launch of our German A: Lang & Lit website.
www.thinkib.net/germanNew Geography website
InThinking is pleased to announce the launch of our Geography website.
www.thinkib.net/geographyForthcoming Workshops
Mathematical studies SL
IBDP Category 1
Berlin, Germany
24 to 26 August 2018
more info
Mathematics HL
IBDP Category 1
Berlin, Germany
24 to 26 August 2018
more info
Mathematics SL
IBDP Category 1
Berlin, Germany
24 to 26 August 2018
more info
Find all InThinking Workshops at www.inthinking.net
Site Author
Tim Garry is the site author and has taught mathematics from middle school to university since 1984 and been Head of Maths at three international schools. He's also been an IB examiner for external & internal assessment, contributor to IB curriculum reviews & Maths HL exam writing teams, delivered numerous workshops & coauthored IB maths textbooks (see below).
moreQuote 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
Extended Essay
Extended Essay  first assessment 2018The assessment regime for extended essays has changed and a new set of assessment criteria will be applied to extended essays starting in May 2018. Please see the page Extended Essay Criteria (2018) for a closer look at the new assessment approach for extended essays with a focus on essays in mathematics. Also see the page Advice  Maths Extended Essays that has...
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...
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.
Blogmore
Some fun with primes ... and Geogebra
18 January 2018
Prime numbers are fascinating, mysterious and useful. The topic of prime numbers can pop up in a maths lesson at many different ages and ability... more
primitive Pythagorean triples
30 December 2017
Over the years, I’ve got the impression that students are as fascinated with Pythagorean triples as they are with prime numbers. Many mathematical... more
Problem: 12 circles circling a circle
28 August 2017
Early in the school year, I like to offer my firstyear IB maths students  especially HL students  some challenging problems. I like creating... more
Subscriber comments

Rosa, Thanks for your query. I had been working on revising the information and advice for the extended essay on my site given the new guide and assessment criteria. See that I have revised this 'advice' page; I've also revised my main EE page;...

Hi, I am also doing supervising for the first time and I could use all the help I can get. Please let us know when this will be updated or if the information is still valid. Thank you in advance!

Thank you and much appreciated

Medhat, Good question. I started working on one  but have not managed to finish it yet. I hope to get one up early next week. Hope that's OK for you.

Dear Tim, Are there any plans for an HL papers 2?

Rhiannon, Yes, you're right. Thanks for finding that. I've corrected it above. Thanks for your feedback.

In question 3 from accessible to discriminating, should 3a specify that the group has 10 people?

Elizabeth, I somehow messed up entering that question. It had a very messy answer. The right side of the equation should have been 1+8i and answers should be x=2, y=1. I've changed it and have uploaded a corrected version 2 of the exercise...

Hi Tim: I might be missing something, but I can't get 2a of EXS_1535v1_HL_complex numbers to work. Can you shed some light on the problem? Many thanks, Elizabeth

Joanne, Your answer is correct  and my answer is wrong. Thank you very much for spotting this error. Don't know how I messed up a fairly easy question. Thanks for your feedback.

Hi Tim, for question #1 (integration basics) I am getting t^2/4cost+5. Regards.

Holly, Thanks for pointing out missing negative for answer to MockC SL P2 Q5(b). I've corrected that. Appreciate the feedback.