*InThinking*

Educational Consultants

Innovative

International

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

### Forthcoming Workshops

#### Mathematics: Application & Interpretation

IBDP Category 1

Lisbon, Portugal

8 to 10 November 2019

more info

#### Mathematics: Analysis and Approaches

IBDP Category 1

Lisbon, Portugal

8 to 10 November 2019

more info

Find all *InThinking* Workshops at www.inthinking.net

### School visits

If you are interested in **Oliver Bowles**, **Jim Noble** & **Cornelia Noble** 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**

# Latest updates

### A project journey7 November 2018

This page is designed to give an example of how students might go from an idea or an inspiration to an actual project that fits the criteria. As teachers we have to work hard to keep this journey on track... more

### Sequences 2 - Solutions17 October 2018

This page offers solutions to the set of IB style questionsThe first 4 terms of an arithmetic sequence are shown below3, 9, 15, 21Solution\(a)\quad 27\quad (Common\quad difference\quad is\quad 6)\\ b)\quad { U }_{ n }={ U }_{ 1 }+d(n-1),\quad So\quad { U }_{ n }=3+6(n-1)\\ \quad \quad \quad So\quad { U }_{ 100 }=597\\ c)\quad { S }_{ n }=\frac { n }{ 2 } ({ 2U }_{ 1 }+d(n-1))\\ \quad \quad \quad { S }_{ 30 }=\frac { 30 }{ 2 } (2\times 3+6(30-1))\\ \quad \quad \quad { S }_{ 30 }=2700\)A geometric Sequence has all its terms positive. The... more

### Non Statistics projects10 October 2018

Before going any further it is probably important to talk about some of the perceived barriers to non stats projects so that we can think about how to overcome them.Relevance and interest - I think that... more

### Mathematics is Forever8 October 2018

In this lovely talk from Eduardo Saenz de Cabezon, he explores what it is for something to be truly 'forever'. It is a really good humoured talk. it is short and very approachable, but it includes a pretty... more

### Visual Sequencesfree1 October 2018

'Get out the multilink cubes and literally build an understanding of arithmetic sequences'Build a visual representation of the sequence 1, 5, 9, 13. What does it look like? What have your colleagues build?... more

### Arithmetic Sum1 October 2018

'Use cubes to do a lovely proof of the sum of an arithmetic sequence!'You need to know how to use and apply the formula for the sum of an arithmetic sequence but here you can go one better by understanding... more

### Focus - Arithmetic Sequences27 September 2018

Arithmetic sequences, those where each term differs from the previous by the same common difference, are a key conceptual element of the course. Strongly linked with linear growth, this important idea... more

### Human Venn Diagrams19 September 2018

'Where do you fit on the giant Venn Diagram?'Help students get to grips with Venn diagrams by making a giant one with playground chalk, coming up with different ways of classifying themselves and jumping... more

### N & A Practice18 September 2018

This page has a variety of tasks designed for practice and revision. Practice questions are an important part consolidating students' understanding of a concept. They can be found from numerous sources... more

### Statistics Practice18 August 2018

This page has a variety of tasks designed for practice and revision. Practice questions are an important part consolidating students' understanding of a concept. They can be found from numerous sources... more