If you homeschool your children...do you have any tips on differentiating "school" time from other "home" time? Perhaps being in a different area of the house, using special materials, a clock/timer of some sort, etc.?

Background: After getting negative feedback on our district's summer school program from multiple families (who aren't all friends with each other), I'm planning to work with my incoming first grader on schoolwork at home for at least the equivalent number of hours she would have been in summer school (it would have been a total of 45 hrs if she'd done their program). I'm looking for ways to indicate to her that this is meant to be serious work time, not just messing around playing school (ie., she can't get up and go play Barbies in the middle of her work). Due to other activities, we may not necessarily do their school work first thing in the morning.

Thanks in advance!