Earning 1 star indicates proficiency in the chapter and readiness to tackle the next one.Earning 2 stars shows a more advanced understanding of the chapter's material.Earning 3 stars is a sign of mastering even the most difficult concepts in the chapter.
Oh, and, uh, by the way, parents have to hop on the system to manually unlock the next unit for their child...which explains a whole lot.
Honestly, that email would have been way more helpful on August 31 than on September 2 (after he'd taken the darn test 5 times; poor kid)!
He'd done just fine the first time (and just fine is fine by me), but by the end he did amazing! And he's super happy to be moving forward (finally).