With average classes, before we read an act, I read the synopsis. To make the reading more interesting, I move the desks into a semi-circle. I assign the main parts to the strongest readers, giving myself a crucial character's part for them to interact with. The weaker readers get bit parts, sound effects, etc. I try to seat characters that interact often near each other in groups.
Many resources exist for the classroom teacher to help make the learning more exciting.
My class ususally reads an act, then watches it. Even students who do not read well, seem to do better when they are able to watch the different characters interact either on video or acted out. I've allowed volunteers to prepare a scene on their own time to present in class when we get to that part. Finally, I resist the urge to pick apart the play and to overanalyze it. Elizabethan audience members certainly were not jotting down notes or reading along with the script.