The red baskets are labeled with letters as well as the lexile level range.
The black baskets on top are for books that come in a series. They are leveled as well.
Those are the Daily 5 book boxes from IKEA ($2.99 for a 5pack).
The bottom shelf has free choice books.
I am so excited that this is done and I feel much better knowing that it will be easier for my kids to pick good fit books in my classroom!