I print out the sheets that they need to do for the week and they are kept in a folder with two sections- 'Done' and 'To Be Done'.
The idea is that they will eventually have the foresight to go into the folder and chose sheets to work on. The reality is that during that small window of opportunity when they seem in 'the mood' to do them- usually if there is some reward or fun trip planned- I present a few sheets and set either a time limit: Do as much as you can in 30 minutes; or completion goal: finish two sheet and then we'll go.
|Sometimes one of them is still working on them at the pool-|
While the other one is done and playing!