## Trigonometry

Download the PowerPoint here. This is basically a lot of ideas knicked from Resourceaholic. Sorry @mathsjem! Quite happy with this, though. I have used this with my year 9 class this year and I think I’ve taught trig better than… Continue Reading

## Estimation

Download the PowerPoint here. I created this after a discussion on Twitter. Estimating is more complicated then I give it credit for. We have to decide the level of rounding that’s appropriate, based on the calculation being done. It’s not… Continue Reading

## Rounding to significant figures

Download the PowerPoint here. I didn’t want to have an example problem pair for this. Instead I went with more of a pattern spotting thing. I think this is quite nice (it all animates in so isn’t displayed at once).… Continue Reading

## Adding fractions and mixed numbers

Download the PowerPoint here. So, I’ve been unhappy with my adding fractions lessons for a while. They were always ‘good enough’ but not actually good. This year, I decided that good enough wasn’t good enough. I needed to finally attack… Continue Reading

## Equations of perpendicular lines

Download the PowerPoint here (thanks to MrBriggs on Twitter for pointing out that I forgot to add this link in!) This lesson went well, actually. Work out the gradients and try and notice something. Then there’s a little bit on… Continue Reading

## Equations of parallel lines

Download the PowerPoint here. I quite like this one. It starts with a little whole class activity saying if two lines are parallel or not. If you click ‘check’ it’ll show you the graph. Nice! Then students have to do… Continue Reading

## Highest Common Factor / Lowest Common Multiple

Download the PowerPoint here. Just an update, really. Someone contacted me about my HCF and LCM lessons being linked wrongly on here, and I realised that they were a bit crap, so I tidied them up. I removed a lot… Continue Reading

## Fractional Indices

Download the PowerPoint here. This is my first post of the term. I guess I’ve started a week late. The reason is quite simple, I think I’ve got a bit of resource writer’s block! This PowerPoint is fine. It’s got… Continue Reading

## Adding and subtracting directed numbers

Download the PowerPoint here. OK. So this is a big one. Firstly, I have found teaching negatives difficult in the past. Teaching the rules is a bit useless. ‘Two negatives make a positive’ often leads students to doing things like… Continue Reading