Just one quick note on trotting poles. The golden rule is to never use two!! There is a risk if you put 2 down there is always a chance of them trying to clear them both!! If you have someone to hand you can start with one then do 3 and add an extra 1 as you see fit. If you are on your own and want to set some up before you go in the school then i would advise to start with 3. You could always set 3 up on one side of the school and 3 on the other etc. Another good exercise with poles is one on each 1/4 of a circle so you have 4 singles. Hope that makes sense!