It really is. I’m so glad my school pay for the subscription, but it’s so good that I would probably pay for it out of my own money if they didn’t. It’s pretty much my go to resource for any KS3 or KS4 topic.

Resource is available here (thanks to @mrsouthernmaths.bsky.social) if you’d like a copy: mrsouthernmaths.wordpress.com/wp-content/u...

Usually I really like the fact that we don’t use calculators until a few lessons in, but actually it was a bit annoying that they couldn’t check their answers here!

…and it was because they were just making up values and moving on without worrying about if they worked! I had to explicitly model how to compare this set with the one above it - we talked about how sd=4 meant they were the same shaped curve (“same stretch factor”) but in different locations.

Amazing! I was teaching this today too, love this topic