Jr Ross wrote: This might be crazy, but I've thought about using the Premier One netting but just not electrifying it. We've had these sheep since they were babies, and they are incredibly docile and don't really test their fencing much.
Totally not crazy - so long as these are "interior dividers". Sort of what Matt said - build a permanent and safe exterior fence, then put light weight, easy to move dividers inside it, with enough divisions, that you can move them every 1-3 days either completely, or following some of Elena's patterns.
Some people have a central "hallway" down the middle or a central "hub" which has water and shade and then open a different paddock every 3 days. I like the idea of a "hallway" that would be mulched with bedding as it would likely get a lot of traffic and not grow well, but it would give a long stretch for "running exercise". I only have small animals (ducks/chickens/geese) and my babies are kept in portable shelters that are only 4'x8', and the lack of running space is a real issue. I have to let them out into the bigger field as young as possible (many flying predators - it's a balance) just for that exercise issue. I generally have Muscovy moms hatch out and mother the babies, which is a big help as they're pretty protective.
That said, you say they're docile. Docile enough to leash them and send a couple of students off with them for a "walk"?