A compilation this week..

From **Desmos** we have the outstanding graphing calculator, their **Facebook page **(you** **do not need to be a Facebook user to view this) is also worth keeping an eye on. Some of the **photos available **make ideal starters. See the Think Fast series or perhaps Mental Maths Monday; there are also several probability problems. I think I’ll try some of the Mental Maths Monday series with my sixth form students – look at **this** for example!

The problem shown in the image could be used with younger students but also with older students who could look at an algebraic proof.

Talking of problems, here’s a reminder of some of the great problems published in **Numberplay** in the New York Times, I do like this **Coins in the Dark Puzzle! **

**Video – Sexy Primes**

This video from **Numberphile **made me think about possible starters / fuller investigations on gaps between primes; something which could be investigated by students of various ages. I like the idea of using it for proof with older students, for example considering which gaps are not possible between primes and why.

**Statistics**

I mentioned several **Statistics resources** recently, including the **Standards Unit** resources, **Mostly Statistics, **an activity I have used recently (with Year 8, age 12-13) which worked really well is **S4 Understanding mean Median Mode and Range, **selecting the link takes you to a new page which includes a PowerPoint for the activity with an introduction and the solutions.

**Reading**

A newsletter I always enjoy comes from Murray Bourne, his **IntMaths newsletters** are always very clearly laid out and I always find something of interest. Recently he talked about the **History of Mathematical Notation **(see Item 2), note the now free download. See **this page** for more useful reading.

**Writing**

Thinking about notation reminded me of this useful advice from John Kerl: some excellent **tips for mathematical handwriting**. (There is a link for students on the **Study Tips** page on Mathematics for Students.

and finally…

**In the news** – look how useful mathematics can be! The University Sheffield Mathematics Department have been considering the very serious problem of **how to build a perfect scone! **You can read the paper** here, **skip straight to section 4 for the recommendations!