Erica is tackling equations of circles but is, as usual, making errors. Can you help Erica correct the errors and explain what she has done incorrectly. designed to get students to check work carefully and discuss what has gone wrong.

Two sets of "explosions" involving prime factors and using them to calculate LCM and HCF. There are some where students are given the two numbers and have to find prime factors, HCF and LCM; there are others where students are given the prime factors and have to find the numbers, HCF and LCM; there are some where students are given the HCF and LCM and need to find the numbers and their prime factors. It it is designed to lead to discussion.

More cheesy jokes for students to discover using their mathematical skills; these are a nice plenary, starter or main activity offering something different from exercises from books. The jokes, whilst terrible, only make them keener to discover the punchline oddly.

Rotate Spidey in the the correct quadrants to capture his enemies. I have produced the Notebook file to save on printing.

Join Woody (from Toy Story) on his fraction ranch, helping to put the animals into the correct pens, feeding them and getting bales of hay together too. This involves equivalent fractions, fraction of an amount and adding fractions. The powerpoint now contains a video!

I have so few resources for a lesson on 3D views that I felt I had to write one and this came to mind. The usual cheesy joke having found all the answers. Depending on the class I do this with I may allow multilink usage or I may not; you will know your class better than I.

Three “Crack The Safe” worksheets: the first tackling “one a line, around a point etc”; the second tackling “parallel lines”: the third tackling “angles in polygons”. These are designed to be used as starters or plenaries and allow students to self-mark as the answers are on the sheet (along with some values that are not answers) - if their answer isn’t on the list of possible answers they need to check their working.

This takes students from fairly straightforward area and perimeter questions (trapeziums, circles etc) through compound shapes and on to cones, frustums and hemispheres including finding the height in terms of the radius for a cone. I have tried to cover all bases with it including density and capacity problems.

The survivors have found some mathematically shaped islands which are zombie free. Find the area and perimeter of the islands to see how many people can live on them and how much fencing is needed to keep zombies out. Rectangles, triangle, parallelogram, trapezium, circle and compound shapes involved.

Two fish jokes to discover: one on reverse percentages (finding an oroginal amount) and one on repeated percentage change (compound interest etc). These work nicely in the classroom, in online lessons and as homework tasks. Students are reassured when words start to appear allowing the teacher to help those who require it.

Three questionnaires to correct and design hopefully covering the majority of things that can go wrong. This has no "bells" or "whistles" but just asks the questions I want it to.

This is designed to lead students through solving quadratic equations by completing the square from quite basic to difficult. The activity is also there to encourage discussion in class and helps them get into good habits regarding setting their solutions out.

All sorts of calculus issues for Erica here! She really needs your (your class') help to correct her work and explain where she's gone wrong. There are common mistakes here for student to find and discuss in class.

Erica is struggling whilst differentiating trigonometric functions, using the product, chain and quotient rules and parametric equations. She is desperate - please help her! Designed for students to demonstrate understanding and to encourage discussion.

Answer the indices questions, link them to the letters then unjumble the anagram produced to find out what Santa left in my stocking this year. This covers basic indices, fractional and negative.

Answer the questions and find my destination each time.

How many Christmas lights will be needed to make this house festive?

Calculate how much each of these people need in each case. It is essentially rounding to the nearest 10, 100 and 1000.

Eight matching activities that encourage discussion in class involving substituting into functions, inverses and composite functions. These would work as a starter/plenary or as a revision lesson on function notation.

Five slides each containing five problems which have either been answered correctly or incorrectly; students decide and justify their answer. This is designed to encourage discussion in class. Topics include simplifying ratio, sharing in a given given, simple proportion, algebraic proportion etc.