We're year rounders, but do it a little differently. From September through April (give or take) we do school 5 days a week, with one day a week being a co-op day. Each month, we tend to do an intensive 3-week main lesson block followed by one week of something "soft". We pick themes for the summer- we've done Hogwarts Summer School, Camp Half-Blood, and this summer we're having a family detective agency-- and usually have a literature focus. Our vacations tend to be somewhat educational, so we count those as school as well. They have lots of time to socialize, play outside, etc.