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

http://www.amathsdictionaryforkids.com/dictionary.htmlhttp://www.amathsdictionaryforkids.com/mathsCharts.html

http://www.mathsisfun.com/definitions/circle.html
http://www.mathsisfun.com/geometry/circle.html

http://www.mathopenref.com/tocs/circlestoc.html
http://www.mathopenref.com/tocs/constructionstoc.html
http://www.mathopenref.com/worksheetlist.html
http://www.mathopenref.com/constbisectline.html
http://www.mathopenref.com/constcircumcenter.html

Circle theorems resources

Geogebra resources
https://www.geogebra.org/b/kQysXXvn#material/F9Kh99tc
https://www.geogebra.org/m/PFf7ehXE

Ideas sites
http://www.resourceaholic.com/2014/11/circletheorems.html
https://www.missbrookesmaths.com/single-post/2015/04/25/Circle-Theorems

Problem solving
http://nrich.maths.org/6007

Our GeoDraw iPad app

GeoDraw at the AppStore

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