When I was learning English, I was greatly helped by a series of vocabulary lists, graded from 1st to 12th grade, and consisting of words that students in those grades were supposed to master1. After learning that vocabulary, I moved on to SAT and GRE prep books, for college-level and graduate-school-level vocabulary.
I'm looking for a similar graded approach to German vocabulary.
I am sure that something like this must exist for German, but I have not hit upon the right keywords and/or search strategy to find it. Any pointers would be appreciated.
I should point out that I am not interested in lists directed at learners of German as a second language. I am (primarily) interested in lists whose target audience consists of (school- and college-age) native speakers of German.
1I found these lists by chance, as a supplement in a dictionary. This all happened decades before Google.