My parents always took my brother and i out of school for our disney trips, but we only went every 3-4 yrs (3 times during my schooling--5th, 9th and senior year for me and my brother was 1st, 5th and 8th grade) so it was not like we missed a lot of school. And we brought our homework with us and had to do homework in DIsney

We always went in Jan when it was nicer and less crowded and we were good students so it did not hurt us to be gone.