180 Days?

I read The Best(?)of The Fischbowl April post about 180 Days?. This post is very funny to me but really true. It talks about how there are 180 days in the school year which are supposed to be for instruction. When you watch the Powerpoint presentation he posted it shows how many days are used or lost in the school year. It talks about the average number or days missed by students and/or teachers and the number of days used for testing. When it comes down to it, how many days are really used for instruction.
I do think there are a lot of days that are not used strictly for instruction, but I also think these "non-instruction" days are needed in order to keep your students happy. Who would want to go to school at all if there were no "fun days" or whatever may take up some of the educational days. Everyone needs a little break every once in a while.