*InThinking*

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**Disclaimer**:
*InThinking* subject sites are neither endorsed by nor connected with
the International Baccalaureate Organisation.

### Forthcoming Workshops

#### Mathematics: Analysis and Approaches

IBDP Category 1

Lisbon, Portugal

8 to 10 November 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

### School visits

If you are interested in **Tim Garry** visiting your school to work with teachers and/or students, please
**contact us**.

### Home-2-Home

The vacation home exchange service for the IB community.

*Feel at home when you travel the world.*

**www.home2home-inthinking.co.uk**

# Blog posts

### one week to go until exams 26 April 2015

Here is an activity that I have found to be very effective revision for Maths HL exams.I have written 10 exam questions for section A of a Paper 1 practice (mock) exam and and another 10 questions for... more

### Geometry problem in work of art 11 April 2015

During the years 1795 to 1805 the famous English poet, printmaker and painter William Blake (1757-1827) created a color print entitled Newton, shown below.The work of art depicts a naked Isaac Newton... more

### pi day 2015 14 March 2015

If you accept the American style of writing a date (month first, then the day) then today you'll be celebrating Day - when the date 3.14 matches the first few digits of . But this year it's a bit more... more

### A Galton Board 10 March 2015

Some day I'm going to build my very own Galton Board (also known as a quincunx). It's a fantastic device for experimentally demonstrating a binomial distribution or binomical coefficients. Without a real... more

### Exploration idea #497 1 March 2015

I recently learned of the following interesting property for a parabola:Many students do not know what the directrix of a parabola is - which is a bit of a shame because then they are not aware of the... more

### Exploration idea #496 18 February 2015

Today in Maths HL class we were using a model of a regular tetrahedron (right triangular pyramid with four faces that are equilateral triangles) to help visualize a particular problem in trigonometry.... more

### maths competition 2 February 2015

I had a very enjoyable time this past weekend in London at the International Schools Mathematics Teachers Foundation (ISMTF) senior mathematics competition that was organized and hosted by the American... more

### distribution of primes on calculator 28 January 2015

It all started out of a conversation between students during a short break in one of my maths classes. The focus of their conversation was a poster I have in my classroom which lists all the prime numbers... more

### CAS - why not? 22 December 2014

In the mathematical world, CAS stands for computer algebra system, not creativity, action & service.Any calculator (I prefer the word "device") with CAS is not allowed to be used on an IB exam. But, in... more

### Is Reality a Mathematical Structure? 15 December 2014

The Swedish-American cosmologist Max Tegmark thinks that the answer to this question is yes. In the video clip below (from the BBC2 Horizon documentary What is Reality? - February 2011), he says, "I think... more