So there's this thing called Summer Loss...

I noticed this with my kids when they were younger and when I decided to homeschool we began school year round to negate summer loss. My children do workbook and online studies for 30 minutes a day and reading for 30 minutes to an hour a day during the week through the summer. You can read more about it here.

http://en.m.wikipedia.org/wiki/Summer_learning_loss#section_4

http://www.nytimes.com/2011/07/28/opinion/28smink.html

http://today.msnbc.msn.com/id/8146912/ns/today-parenting_and_family/t/stanch-your-kids-summer-learning-loss/