Hoping someone who's already had this experience can guide me.

Got 4th grader's reading assessment from teacher. Turns out he's hit letter Z in reading level. Don't know his MAP-R score, but was told that it was consistent with the level. So, what happens now?

He's in a good place for this year, and teacher is working on writing with him. But how do you measure continued learning/stronger comprehension/deeper thinking and progress from here?