Meredith asked for directions for the bank game Kieran was playing in a previous post and I figured I would post them here as well. Montessori World has directions for the decimal system activities that we have used. Shu Chen Jenny’s Math album has a similar set of instructions for golden bead decimal work. the bank game is basically what they call the addition and subtraction work. The tray with all the blocks on it is the ‘bank’ where the student can trade in ten ones for a ten rod for instance. 

I substitute base ten blocks because they truly are the same thing – just square. I can live with a variation like that. ; ) They are also very easy to come by locally. If you don’t feel up to making all the exercises yourself then an inexpensive workbook like Spectrum Math can be used for practice. You just use the blocks to present the concepts vs the book.  That is what ours are doing they are able to compute much larger numbers than their ages and grades would suggest.

Hope that helps!