Wow! I think that our periods are too long but yours are massive, how do you not get bored?
It does get boring sometimes, but generally it's not too bad. The worst thing is when the teacher just lectures for the whole lesson like my chemistry and physics teacher enjoys doing (he's not too bad of a teacher, but last week he spent the whole lesson doing example questions on the board).
Mondays can get bad because I have two periods of Maths in a row (that's 3.5 hrs of Maths with only recess between them).
All of y'all's lessons must go by so fast! How do you all take tests which go for over and hour? and do practical stuff like experiments?