There's a minimum distance between the bottom of a habitat and the education board, if it is too far from that it won't work.
I'm going to guess that your board is on an elevated walkway and it's too high. If you have a single flight of stairs, it should be fine even if you go pretty high with the board, but if it's a double flight of stairs the board needs to be almost touching the walkway in order to be close enough.
If it's not an elevated walkway, I'm not sure how you can have it "too far", but move it closer and it will work. What I do in situations where the board is too far is leave the education heat map on and slowly move the board closer with the X key arrows until it changes color to indicate it is working.
Can't help with the transport rides, I have the same problem sometimes. When I first load my game visitors get on my transports like crazy, the lines completely fill up...but once the zoo has been running for a few minutes and those lines are done...no one rides them. I think it's a bug introduced in the 1.03 patch, because my rides were all very busy all the time before that patch. Plus it makes no sense that reloading the game also makes them busy only for a short time if it is not a bug.