There are several things that we can do to keep the Bell Ringing Brain Cell in action. One of these is to play with some worksheets. These will appear irregulary from time to time.
Find them here: Some Resources (or on the menu above).
The latest one is out today. It introduces Place Notation, a cunning way to condense a complicated method into a single line!
Do let me know if you find them useful, interesting, boring, incomplete – or whatever.