National Council of Teachers of Mathematics
The Math Forum: Urban Systemic Initiative/oceans of Data
This site includes questions related to reading and understanding graphs. There are links on this site to lesson plans, benchmarks, and other webpages all of which mostly center about probability and statistics.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Stats & Probability Lesson Plans
A collection of elementary lesson plans for the beginning study of statistics. These plans, written by educators, detail the materials needed for the instructional activity and the steps to be followed.