They'll probably give him 3's next trimester and then 4's. That way they can pat themselves on the back because he has made so much progress.

My son's school has a huge packet with lists of skills. The kid either gets a "X" for mastery, a "/" for having had an introduction to the skill or it is blank.

So for counting it might have

1-10 X
1-20 X
1-100 X
1-1000 X

The lists cover everything from standard academic skills to consistently washing hands and using a tissue when needed.

Even though your school doesn't use that system, you might ask the teacher to explain what skills she wants him to have and how he has or has not demonstrated mastery.