With many thanks to Dan Pearcy I stumbled across his introduction to trigonometry lesson. I ran it with my year 9 advanced class and I thought it was great! Love the moment when I started writing out all the ratios and the comments around the room on cue started: “surely we aren’t going to write all these out”, “we are going to run out of room sir” etc! Good fun and a great way to get into the ratios without just plonking SOH CAH TOA on the board!!
Here’s a great desmos problem solving activity on ‘practical trigonometry’
NB: This link is for a youtube video showing just what is the sine, cosine wave etc. Looks interesting… perhaps more useful for something like an 11 methods class?