"Math Matters, Apply It! is an applied mathematics awareness campaign, created for anyone who wants to know more about the mathematics behind everyday life and the technologies we encounter. Currently, there are 16 different PDFs available for download and SIAM is in the process of producing more."
"This site is organized around seven key concepts of math, according to the New York State Education Dept., for each grade, 5-8. The seven key concepts are: Mathematical Reasoning, Numbers and Numeration, Operations, Modeling/Multiple Representation, Measurement, Uncertainty, and Patterns and Functions. Each key concept has activities and resources developed for each grade 5-8."