Seventh Grade Design Parameters (K-12math.info)
From WikiEducator
This grade level (age 12 ) has a range of 514 different terms out of a list of 1,000 terms used in elementary and secondary school mathematics textbooks.
The average textbook contains 208 terms.
Information comes from k-12math.info . An open information source concerned with helping understand the present structure of primary and secondary school mathematics; and as a bibliographic system for the development of new materials.

