Found this one really helpful intro to percentages with a year 8 class – revealed what they might have known and was able to pause the activity at certain points for some key learning moments.
There was also another one with potential to use…
Don’t recall too many examples I’ve come across like this one of Robert Kaplinsky’s that is based around an engaging stimulus / 3-act type task for looking at lowest common multiple (aka LCM).
Not that it’s every really pi day in Australia, but in case I want to run some activities sometime…
Here are some links to resources / puzzles / activities etc. that I have found useful doing work on congruent triangles.
Varied names around the world for the same topic! A key starting point in looking at this though is probably Michael Fenton’s blog on the topic, in particular noting the way he talks about the indices as ‘number of factors of’. This idea is talked about further here on Sara’s site where she also includes some other ideas worth looking at. I found the factors idea particularly helpful when discussing fractional indices (it was one of three ways I looked at it – the other of the two ways I think students found helpful was just recognising, for example, how 9^1/2 x 9^1/2 = 9, therefore 9^1/2 must be 3).
NB. Robert Kaplinsky’s ‘Depth of Knowledge‘ page includes a sample of ideas relating to indices (as well as fractions and equations)
This seemed like a good desmos activity – described as combining desmos with open middle!