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About: All content on this site has been written by Andrew Chambers, Head of Mathematics at the British International School Phuket.

I currently also work as an IB Mathematics Examiner and was a lead author in setting up the IB Mathematics Digital Channel.

I have an MSc. in Mathematics and love writing about the subject! You can read posts on everything from elliptical curve cryptography to Markov chains and chaos theory on my other site: ibmathsresources.com.

Reviews: These resources are now being used in over 200 schools worldwide – across Asia, Europe and North America. Below are some teacher comments:

“I absolutely love your work . You do fantastic work and it is well worth the cost.”

“Excellent worksheets”

“I love to see Python in the enrichment section”

“Excellent quality of resources”

“This will save me hundreds of hours of work!”

“Really amazing Paper 3 resources – thanks.”

“I absolutely love your website!.”

“Very easy to navigate and user friendly”

“Consistently high quality”

“The site has been fabulous.”

“I am happily using many of your resources in my lessons.  The students love the treasure hunts in particular!”

“Your site is brilliant and I am sure if made a large contribution to the bumper crop of 7s my students achieved this summer.”


“Your site is a treasure for the IB world!”

“Quality of resources: Excellent! I love the Python enrichment”

“My HL AAs love your worksheets – I like that they hit the IB rigor”

“The quality of worksheets is very good”

“This is fabulous!”

“My students have really benefited from your resources – thanks!”

“Thank you so much for everything you do, it is appreciated!”

“You have cut down a huge amount of work for us IB math teachers and for that I cannot thank you enough. “

“I really value the resources on Intermathematics and would like to thank you for putting this together. As a first-time IB teacher, I have benefited from this website significantly. “

“Thanks for the amazing website and resources – we all love it!”

“Thanks for excellent resources!”

“The tests are really good and without mistakes – thanks!”

“Thank you for access to all of your amazing resources!”

“Thank you so much; my students and I appreciate it! “

“Thanks so much for creating this website. I’m a brand new IB Math Teacher and this website has been a lifesaver. I especially like the Paper 3 activities for HL. “

“Your resources are extraordinary saves lots and lots of preparation time. “

“I am working as a math tutor in Seoul . This is a very useful site for IB math teacher like me . And thank you for making creative questions and your efforts . “

“The information packs you produced for the Exploration are very useful for my students. The one on using Desmos is especially useful. Thanks! “

“I am a big fan of the work you do through your websites.”

“Your unit tests are very useful for exam revision.”

“I love your website!”



Welcome to intermathematics!

On this site you will find 3000+ pages of pdf and flipchart content to help teachers at international schools around the world.

The content includes:

  • Hundreds of resources to support teaching all four IB Mathematics courses:  SL Analysis, HL Analysis, SL Applications, HL Applications. 
  • Over 200 original pdf worksheets combing skills practice and past paper style questions.  These are complete with full typed worked solutions.
  • Over 20 original Paper 3 investigations.
  • Comprehensive coursework guides to support students in the exploration process.
  • Mock examinations for SL and HL Analysis, and SL Applications.
  • Unit tests for SL Analysis and SL Applications covering the whole syllabus.
  • Treasure hunts, classroom investigations, Desmos, Geogebra and Python activities.
  • Extras including full worked solutions notes for IGCSE and IB SL and HL Analysis, an EE guide for mathematics, a TOK mathematics guide, maths club activities and more!

You can explore the site by clicking on any of the menu subsections marked with (free) to see the sort of content available.  Scroll down to see some downloads. Teachers and tutors can join to gain full access.

Recently added content:

Super GDC Guide ApplicationsScreen Shot 2023-05-06 at 11.26.29 AM

Super Speed Quotient/ProductScreen Shot 2023-05-06 at 11.19.05 AM

Super GDC Guide AnalysisScreen Shot 2023-05-06 at 11.44.31 AM

Treasure Hunt: Chain ruleScreen Shot 2023-04-23 at 4.29.38 PM

Treasure Hunt: Quotient/ProductScreen Shot 2023-04-23 at 4.30.08 PM

Treasure Hunt: Tangents/normalsScreen Shot 2023-04-23 at 4.30.24 PM

Proving PythagorasScreen Shot 2023-03-20 at 3.28.40 PM

Investigating a perfect rugby kick Screen Shot 2023-03-18 at 2.44.18 PM

Mini-investigation: Circular logicScreen Shot 2023-03-20 at 3.27.31 PM

Test:  Applications SL: Stats and ProbScreen Shot 2023-01-18 at 8.13.31 PM

Test:  Applications SL: Calculus Screen Shot 2023-01-18 at 8.13.31 PM

Mini-investigation: Square danceScreen Shot 2023-03-10 at 4.39.11 PM

Test:  Applications SL: AlgebraScreen Shot 2023-01-18 at 8.13.31 PM

Test:  Applications SL: Functions Screen Shot 2023-01-18 at 8.13.31 PM

Test:  Applications SL: Geometry Screen Shot 2023-01-18 at 8.13.31 PM

Test:  Analysis SL: DifferentiationScreen Shot 2023-01-18 at 8.13.31 PM

Test:  Analysis SL: IntegrationScreen Shot 2023-01-18 at 8.13.31 PM

Test:  Analysis SL: Stats and ProbScreen Shot 2023-01-18 at 8.13.31 PM

Test:  Analysis SL: TrigonometryScreen Shot 2023-01-18 at 8.13.31 PM

Test:  Analysis SL: FunctionsScreen Shot 2023-01-18 at 8.13.31 PM

Test:  Analysis SL: SequencesScreen Shot 2023-01-18 at 8.13.31 PM

Sectors: Hungry Goat Investigation

Screen Shot 2023-01-14 at 2.51.55 PM

Vectors: Neural Networks

Screen Shot 2023-01-14 at 3.00.33 PM

Test:  Analysis SL: Algebra

Screen Shot 2023-01-14 at 3.12.46 PM

Treasure hunt: Vector linesScreen Shot 2022-11-13 at 2.56.12 PM

Treasure hunt: Dot productScreen Shot 2022-11-13 at 2.55.59 PM

Treasure hunt: QuadraticsScreen Shot 2022-10-23 at 12.34.16 PM

Applications Paper 1 MockScreen Shot 2022-12-05 at 1.38.47 PM

Playing games with Markov chainsScreen Shot 2022-05-09 at 10.40.12 AM

Applications Paper 2 MockScreen Shot 2022-12-05 at 1.38.47 PM

Paper 3: Curvature of curvesScreen Shot 2022-09-18 at 6.50.12 PM

Paper 3: Planes and conic sectionsScreen Shot 2022-09-18 at 6.50.26 PM

Paper 3 and Exploration packScreen Shot 2022-09-18 at 6.37.51 PM

Anscombe’s quartet activityScreen Shot 2022-08-04 at 2.42.21 PM

Vectors and Geogebra guide Screen Shot 2022-11-13 at 2.55.45 PM

Graph theory: Eulerian trails Screen Shot 2022-05-09 at 10.39.31 AM

Below you can scroll down to download some examples of worksheets provided. If you are interested in membership of this site then please click here to join.  I’ll be happy to help with any questions!

Sequences teaching pack (47 page pdf):

Introduction pack (45 page pdf)

Screen Shot 2022-01-10 at 7.52.09 PM

Eight Paper 3 Investigations ( 20 page pdf)

Statistical investigation (6 page pdf)

Modelling with quadratics (4 page pdf)

Screen Shot 2021-10-03 at 5.19.39 PM

Exploring Julia Sets (4 page pdf)

Screen Shot 2021-10-03 at 5.20.29 PM

Binomials treasure hunt (8 page pdf)

Screen Shot 2021-11-08 at 6.59.51 PM

Maths and TOK (14 page pdf)

Screen Shot 2021-11-08 at 7.05.24 PM

Where to build a hospital? (5 page pdf)

Screen Shot 2021-11-08 at 7.21.34 PM

Circle rolling along a curve (3 page pdf)

Screen Shot 2021-11-08 at 7.28.10 PM

You can download these files here:

File Last Modified Download
Maths TOK Support 2021/11/05 Download
Applications Where to build a hospital 2021/10/30 Download
Binomials treasure hunt 2021/11/04 Download
Bridge Building 2021/10/03 Download
Julia Sets 2021/09/27 Download
Introduction pack 2021/09/26 Download
Sequences teaching pack 2021/09/26 Download
Eight Paper 3 investigations 2021/09/26 Download
Ball rolling on a cosine curve investigation 2021/09/22 Download
Statistical investigation with Desmos 2021/08/28 Download

If you are interested in membership of this site then please explore the free content sections in more detail and click here to join.  I’ll be happy to help with any questions!