A video from the Autograph team. In this activity we explain how to enter equations and introduce Slow Plot, the Scribble Tool and the Constant Controller. Clicking on the web-link below takes you to all the videos in this series.

The 22nd in Mr Barton's Autograph Video tutorial series. This week we look at our fourth Circle Theorem - the notoriously difficult Alternate Segment Theorem. Can Autograph help us understand when this theorem works and when it doesn't? There is also a look at how to construct tangents and a sneaky way of measuring angles. Below the video you will find an option to download it and play it on a larger screen, or by clicking on the web-link you can see all the videos in this series

The 19th in Mr Barton's Autograph Video tutorial series. This week we look at our second Circle Theorem - this classic Cyclic Quadrilateral Theorem. After quickly constructing and demonstrating the theorem, we also have a look at a nice little extension question involving parallelograms... Below the video you will find an option to download it and play it on a larger screen, or by clicking on the web-link you can see all the videos in this series.

A few years ago I wrote a set of notes for pupils and put them on my website. The notes were supposed to be written in a pupil-friendly way, and different to notes students might find in textbooks or elsewhere on the internet. I have converted the notes to PowerPoint slides so you can download them, adapt them if needed, use them in revision lessons or perhaps give your students a set to take home with them to help them prepare for exams. The chances are there will be a few mistakes here and there, so if you spot any please email me & I will correct them. Hope they are of use!

A video from the Autograph team. In this activity we will demonstrate a link between the graphs of trigonometric functions and the unit circle. Clicking on the web-link below takes you to all the videos in this series.

The 8th in Mr Barton's Gapminder World Video series. What percentage of males aged 15 to 64 are employed in countries across the world? What regions have the highest levels of employment? Is it to do with wealth or tradition? How about if we look at females aged 15 to 64? Lots of questions that need answering by Gapminder World! Below the video you will find an option to download it and play it on a larger screen, or by clicking on the web-link you can see all the videos in this series

Earliest recommended Year group: Year 10. Imagine you needed to remove one metre depth of topsoil from a new building plot. What volume does this represent? How many wagons will you need, etc? By approximating this area to a polygon (where you know the coordinates of the vertices) makes the task very easy (even easier with a spreadsheet). This is from the “Something in Common” collection of resources by John Burke. They allow consolidation of key skills, prevent students from copying each other (as all the questions are different), make marking and assessing easy for the teacher (as all the answers are the same!), and provide a lovely extra challenge for students as they try to figure out exactly what is going on! To access the full collection, and read John’s background notes, please visit: http://www.mrbartonmaths.com/common.htm

The 7th in Mr Barton's Gapminder World Video series. Which country in the world is the highest emitter of C02 per person and how has this changed over time? As ever, there is only one way to find out and you might just be surprised at the results! Below the video you will find an option to download it and play it on a larger screen, or by clicking on the web-link you can see all the videos in this series

In a special 'loved-up' edition of Mr Barton's Autograph videos, we look at a romantic (mathematical) alternative to chocolates and flowers to send to the love of your life to let them know you care. Happy Valentines Day! Below the video you will find an option to download it and play it on a larger screen, or by clicking on the web-link you can see all the videos in this series.

The 10th in Mr Barton's Gapminder World Video series. This week we take a look at Employment Rates around the world. Is it the case that the richer you are, the higher proportion of your population are in work? And how about if we just look at 15-24 year olds? Below the video you will find an option to download it and play it on a larger screen, or by clicking on the web-link you can see all the videos in this series

A puzzle for the classroom wall, which could maybe form part of some kind of weekly competition.

A simpler version of the puzzle. Print out or just project on the board for whole class discussion.

The 9th in Mr Barton's Gapminder World Video series. In a video dedicated to Chris Holden, Amy Holden and their beautiful new baby daughter Isabelle Rose Holden, this week we look at some time series data on population growth rates around the world. How does the growth rate of the UK and USA compare to that of Qatar and Kosovo, and what on earth is going on in the Cayman Islands? Below the video you will find an option to download it and play it on a larger screen, or by clicking on the web-link you can see all the videos in this series

The 11th in Mr Barton's Gapminder World Video series. In this video, we fuse together two of my favourite things - Gapminder World and Autograph. We see how we can process the data from Gapminder using Autograph's powerful statistical engine in order to anyalse the strength of correlation. More statistical diagrams next week! Below the video you will find an option to download it and play it on a larger screen, or by clicking on the web-link you can see all the videos in this series

A video from the Autograph team. How can we find the area A under the curve y = f(x) between x = a and x = b? Clicking on the web-link below takes you to all the videos in this series.

a set of cards for students to cut out to form the most famous proof of pythagoras' theorem

An idea for a starter activities to engage pupils. It contains possible extension activities.

A series of challenging problem solving questions from Canada. Tricky, but good.

A Tarsia activity on practicing times tables. These type of activities can be used to consolidate understanding of a given topic, and foster positive group work and co-operative learning. For more ideas on how to use these types of activities (including twists!) and to download the latest version of the wonderful free software to open this resource (and create your own), just click on the web-link. If you have any comments, or spot any (non deliberate!) mistakes, please share them below. Many thanks to all the teachers who have helped me assemble these Tarsias over the years.

A special video from Autograph creator Douglas Butler. A very large hexagonal structure in Western Australia is grabbed from Google Earth and analysed in Autograph