# The week that was (no. 14)

It’s been a busy week. The tiredness is starting to hit and I’m beginning to feel the need for a holiday.

My classes have been learning about:

• S2 – drawing and interpreting graphs
• S3 – appreciation and depreciation
• AH – sequences and series

Don of the week

Yip, another Don Steward mention. Before looking at how to draw pie charts I showed this question to my S2 class.

It was a really great way to assess whether they understood how the frequency related to the size of the segment in the pie chart.

Frustration of the week

My frustration is the inability of pupils to use their calculators correctly. Whilst working on the quadratic formula, despite me pointing out exactly how to use the calculator properly, many pupils did this:

When working out the highlighted calculation, by not putting a bracket around the -2, the calculator worked out the answer as 4 instead of 12.

This happened with several questions which led to incorrect answers as well as many MATH ERROR displays due to trying to find the square root of a negative number. Why do my pupils ignore me?

Joke of the week

Teaching the quadratic formula allowed me to share this joke with my N5 classes: “what do you feed baby parabolas? Quadratic formula”. It was received with a few smiles and lots of groans.

Resource of the week

My S3 lesson on Thursday ended up being a review lesson as half the class were away on a trip. I decided to recap non-calculator percentages with the help of this Code breaker by Andy Lutwyche (@andylutwyche).

It worked great. The pupils loved trying to figure out the punchline to the joke and then tried to create their own when finished.

Starter of the week