Monthly Archives: November 2019


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 I ever have before. Starts with sine. Talking about similar triangles. Not using the calculator… Read More »


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 just as simple as rounding to 1 s.f. I did some questions that are quite… Read More »