Plenty of material here to support work on circles including links helpful sites for definitions, constructions and the circle theorems. Useful to TSST or SKE courses too.

Flipchart file
Pdf file
Spreadsheet file
Circle Grids flipchart

Here are the sites we like for this work:

Dictionaries, definitions, constructions etc

Circle theorems resources

Geogebra resources

Ideas sites

Problem solving

Our GeoDraw iPad app

GeoDraw at the AppStore

Adblock software

Some of these sites have adverts: this works really well
Free Adblock softwareWindows and Mac