That's great that your school is so proactive! Like others have said, the second grade MAP test is computer-based, so make sure she is familiar with a mouse. No prep needed, and in fact, no prep desired because you and the teachers want to see what she knows right now. The test gets progressively more difficult, so a warning that she might see some symbols she doesn't recognize but that it just means that she's done really well in certain categories and so she's getting problems from things she hasn't covered yet.
When DS was given the 2nd grade MAP in kindy, it really helped in our advocacy. The school finally was able to see what our kiddo could do and compare it with the school's second graders. This was quite meaningful to the school, and they then started providing a lot of differentiation (they gave him 2nd grade math).
