As Gershon promised, there will be school on Erev Shavuot and Election Day. I've never heard a good explanation why either of those should be days off.
Teacher training is BEFORE school starts not in the middle of the year. & no more early dismissals for parent-teacher conferences either the day before or after.
All told its 178 school days which is more than any of the existing JDS's but still 2 days less than the public schools. We just need to put in 2 days of Chol Hamoed Succot & we'll be there!
Impressive that they are able to have more days while still keeping the costs way down. Hope they can keep it up!