# Monthly Archives: July 2018

## New lesson(s) – Completing the square

This lesson has been superseded by a new one here: Completing the Square Post

Fixed some wrong answers on the Solving quadratics by factorising vary and twist. I wrote some timed questions on rounding to multiples of ten and rounding to decimal places. I updated the timed questions page so that you can now change the font. Try it by clicking the font names underneath the yellow carousel. I’ve… Read More »

## New Lesson: Using the quadratic formula

THE LESSON IS HERE. This lesson was a massive learning curve for me and I’ve massively changed it after I taught my year 10s. The first version of the lesson presented an example problem pair and asked them to get on with a variation activity. How hard could plugging numbers into a formula be? Well,… Read More »

## New(ish) lesson: Factorising Single Brackets

THE LESSON IS AVAILABLE HERE This isn’t completely new. I’ve edited and refined a lesson I’ve had on here before. Except I’ve packed it with MORE STUFF. I’eve tried to use Jo Morgan’s idea of going more in depth. So this lesson has: Some I do you do/examples. One of my vary and twist activities.… Read More »

## Robert Low: Why is subtraction so hard?

Really interesting article and worth a read Subtraction presents various problems to learners of mathematics, not least with the mechanics of hand calculating the result of subtracting one multi-digit number from another. But that’s not the kind of difficulty I’m interested in: I’m more interested here in the difficulties that arise when computations involving several… Read More »

## New lesson: Finding roots of quadratics by factorising

This is my biggest set of lesson stuff yet. The PowerPoint introduces the topic. It sets up some example-problem pairs. It then leads onto some vary and twist questions, which are available here as Word file. The PowerPoint then goes onto talking about solving when rearranged and includes a Victorian textbook exercise and some questions… Read More »