A complete lesson on finding percentages of an amount using non-calculator methods, by relating them to the key percentages of 10%, 25% and 1%. See the cover image to get an idea of the intention of the lesson. Activities included: Starter: A set of questions to recap on finding 50%, 25%, 75%, 10%, 5%, 20% and 1% of an amount. Main: Some slides to introduce the idea of using the key percentages to find other percentages. A worksheet to consolidate these ideas, followed by three flowcharts in the style of the cover image, where pupils are given a starting number and work out all the percentages. The starting numbers get progressively more difficult. I use this as a non-calculator task, but it could be used with calculators too. An extension task where pupils work out some percentages not included in the flowcharts, by combining percentages. Plenary: A great discussion question, looking at four possible ways to calculate 75% of a number. Printable worksheets and answers included. Please review if you buy as any feedback is appreciated!

Starts with the basic tests for numbers up to 10, then looks at tests for higher numbers and finally problem solving using divisibility tests. Also looks at proofs of some of the tests using algebra. Worksheets at end for printing.

Classic quiz with questions on area, including parallelograms, triangles, trapezia and composite shapes made with rectangles. Answers on each slide by clicking on orange squares plus on last slide. Hope no-one minds my use of an image of Bob Holness - he will always be the face of Blockbusters to me!

A selection of puzzles, most using the digits 1 to 9 and an element of working systematically to obtain a solution. A few are from the the excellent Nrich website. Based around key skills of adding, subtracting, multiplying and dividing but that doesn't mean they're easy!

One significant figure estimation is a boring topic, so what better than a rubbish joke to go with it? Pupils answer questions and use the code to reveal a feeble gag. Mistakes on first version now corrected.

Worksheet where answers to questions are used to obtain a 3-digit code (which I set as the combination to a lockable money box containing a prize).

Classic quiz with question on angle rules, including simple parallel lines and knowledge of shape properties. Answers on last slide. Hope no-one minds my use of an image of Bob Holness - he will always be the face of Blockbusters to me!

A powerpoint with worksheets on the profit parabola model. A nice rich task to use with high-ability GCSE students, to deepen their understanding of quadratic functions/maximum points and also to see a real-life application of maths.

A challenging set of puzzles involving equivalent fractions, probably best for high ability secondary groups. Also offers pupils practice of using divisibility tests, simplifying fractions and working systematically. Please review if you like it, or even if you don’t!

A challenging set of puzzles, that mainly require pupils to use their knowledge of the properties and area rule of a parallelogram, but also involve finding areas of triangles. Includes a few ideas adapted from other sources, one of which is Don Steward’s superb Median blog, the other I’m afraid I can’t remember. Please review if you like it, or even if you don’t!

Pupils are given two fractions as the start of a sequence, and try to extend it. Could be made easier or introduced using integers rather than fractions, maybe with some decimals and negatives in between. Works as either a ‘low floor high ceiling’ task, or as a way of revising different sequence types and also decimals, negatives and fractions. Particularly for the quadratic sequence, there’s scope to spend time looking at the algebra needed to find solutions. Please let me know if you can think of any other ways to extend the task!

Inspired by the TV show, pupils work in teams on a mix of Physical, Skill and Mystery maths puzzles . Game is divided into four zones based loosely on contributions of Greek, Egyptian, Indian and Chinese mathematicians in history. Teams collect crystals that buy a head-start in a final mega-puzzle - a really tough maze.Worksheets for printing at end of presentation which is clickable between menus.

Worksheet where answers to questions are used to obtain a 3-digit code (which I set as the combination to a lockable money box containing a prize). Pupils race to finish first and crack the safe.

A GSP file (requires Geometer's Sketchpad software to open) which measures, for a right-angled triangle, the sides and ratios sin, cos and tan. The triangle can be changed dynamically. Also shows the graphs of the ratios. Could be used to introduce trigonometric ratios, explain the graphs of sine, cosine and tangent up to 90 degrees or to generate questions on SOHCAHTOA.

A treasure hunt requiring knowledge of interior and exterior angles. Two sets of questions to dissuade pupils from just following each other! Mistakes on first version now fixed.

Worksheet where answers to questions are used to obtain a 3-digit code (which I set as the combination to a lockable money box containing a prize). Questions on all aspects of parametric functions as seen in C4

A treasure hunt/follow me activity on circle theorems.

Starts as a dice substitution game but goes a lot deeper by considering the expressions as functions and the effect this has on potential strategies for playing the game. Only suitable for able GCSE students - requires a good grasp of quadratic functions. Nice way of revising and exploring the connection between expressions and functions.

An always, sometimes, never activity looking at various properties of triangles (angles, sides, perimeter, area, symmetry and a few more). Includes a wonderfully sneaky (but potentially confusing!) example of triangle area sometimes being the product of the lengths of all three sides. A good way of stimulating discussion, revising a range of topics and exposing misconceptions. Please review and give feedback, whether you like the activity or whether you don’t!

Maze consists of squares containing identities, some of which are false. Pupils can only pass through squares containing true identities. Identities require ability to expand & factorise quadratic expressions and simplify algebraic fractions, so really only good for a GCSE top set. Extension - pupils find identities of incorrect squares and then design their own maze (there's a good discussion to be had about how to make a good maze - including common misconceptions to fool people).