Six "spiders" on probability. The first two are basic, the middle two are two events (independent) and the final two are two events (dependent). Some "legs" answer questions, some legs give the answer and ask for the question. They have been split this way so that you can use different "spiders" with different classes. These should encourage discussion and questions such as "Is that the only answer?" which should demonstrate understanding. Typos corrected.

All triangles and quarilaterals plus a regular polygon slide with 8 statements that students must decide whether they are always, sometimes or never true. This should create discussion. I have said that squares are a type of rectangle, and a rhombus is a type of parallelogram.

There are eight matchings here: 4 surface area and 4 volume. They get increasingly difficult moving through cubes/cuboids to prisms to cones, cylinders, pyramids and spheres. These are designed to be used as starters or plenaries but you can use them for a lesson main activity, totally up to you.

This idea is from Craig Barton and is an excellent one (check them out his at website); essentially it is four questions based on the same information. There are four here which use perimeter, area, Pythagoras, equations of lines, coordinates, vectors, equations of circles, expanding brackets, solving equations as well as other topics. This really should create discussion and a deeper understanding of the topics covered on top of ensuring that students actually read the question. I hope these are worthy! I will be using these as starters or plenaries.

The students are given the answer and asked to fill in the gaps in the question. Topics used involve probability, algebra, fractions, percentages, ratio, speed, distance, time and many others. Some of the questions allow for multiple answers so discussion could be had. Designed to be used as starters/plenaries to get the grey matter moving. The Easter theme runs through every question and is a tad tenuous at times but there you go.

Work your way up to 3D Pythagoras and trigonometry…

This was an idea one of my Year 10s gave me using the "Mean Girls" films. This covers basic mean, median and mode before moving on to stem-and-leaf (including IQR) and grouped data - there are three very distinct sections moving up in difficulty to enable you to start/end where you like. It's all on the powerpoint to save the planet (no worksheet) but everything can be copied and pasted to create a worksheet.

A series of real-life graphs that are misleading in some way. Nice for a discussion activity.

This covers adding and subtracting vectors and multiples of vectors before moving on to describing journeys using vectors. This is essentially a load of questions on vectors but they should encourage discussion in class. Typo corrected

Surds practice from basic simplifying to expanding brackets to rationalising denominators. This encourages workings and the students to work backwards (what's the question given this answer?) so should also encourage discussion in class.

This is a different way to allow students to gain some practice in short bursts and helps introduce fractional indices. The point is to generate discussion in class whilst the students do some work.

Four sets of four problems where students have the answer but there are blanks in the questions which require filling in. This is designed to create discussion in class and hopefully provides natural differentiation (stretch the “top end” by finding the general solution where possible compared to finding a single solution). I will be using these as starters or plenaries as I believe they will develop deeper understanding of topics, but feel free to use them as you like.

I just wanted something that covers bar graph; this covers “normal”, comparative and composite bar graphs and is designed, in two cases at least, to create discussion.

Taking students all the way from pictograms, through bar charts, pie charts, stem-and-leaf, scatter graphs, frequency diagrams, cumulative frequency, box plots and histograms. The graphs are as large as I can make them and should be ok if copied on to A4.

There are 8 sets of five questions that have been answered either correctly or incorrectly, the students have to decide which. These are designed to create discussion in classrooms and include one-step, two-step, brackets, variables on both sides, equations involving fractions, simultaneous equations (linear only) and quadratic equations (both factorised and non-factorised). Hopefully there should be something for all levels up to GCSE.

Six slides each containing five questions where students need to decide if the answer given is correct and explain how they have arrived at their conclusion. Topics include whether a coordinate lies on a line given its equation, y=mx+c, equations of curves (quadratics, cubics, reciprocals), gradient, These are designed to generate discussion in class.

This is an exercise in finding the best way of buying what a customer wants given four different “deals” on pricing. You can buy more than required but not less which should add an extra bit of challenge. Workings are essential and I have provided answers on a separate slide each time. There are five to work out and this should lead to nice mathematical discussions. I have also put this in a format that could be used easily online if this is desirable.

This is an attempt to relate algebraic questions that children struggle with to worded questions they can all do. It is designed to start you off, building up from 'I think of a number' to a full blown linear equation.

A task based on card shuffling from QI from a video posted on Twitter by @bobloch. What possible order could the cards be in in each case?

This is designed to help introduce factorising of quadratic equations in order to solve them. This should lead to some discussion.