Okay, the question is "In what ways and to what extent did the constitutional and social developments between 1860-1877 amount to a revolution?" I don't see what the teacher really means. If it means a revolution as in the industrial revolution, it didn't really happen. The black codes just went back to slavery in 77. I don't really know what to say since you can't argue in the opposite direction.
Well, what do you think of when your teacher asks you if it was a revolution? If you think he/she is asking if it was an industrial revolution, then write about how it wasn't. If you think he/she is talking about some other kind of revolution, write about how it was or wasn't, depending on what you think. It sounds to me like a fairly open-ended question in the sense that you can go about it from a variety of different viewpoints.
Look at the different ways of tackling the topic I presented to Arbies. Thats should help with actual methods of writing it.
Please try and be a bit more mature.