Pre-School Design Parameters (k-12math.info)

Curriculum designing parameters
Using the website [k-12math.info] as the source, the following information is provided:

This grade level has a range of 79 different terms out of a list of 1,000 terms used in elementary and secondary school mathematics textbooks.

The average textbook contains 25 terms of those 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.