"Common Core is driving a lot of the growth in open education production and curation, with new databases and sources popping up left and right. It can be overwhelming to wade through everything, and find a source that works for your classroom. With that in mind, here are some math open education resources for elementary educators."
"DASL (pronounced "dazzle") is an online library of datafiles and stories that illustrate the use of basic statistics methods. We hope to provide data from a wide variety of topics so that statistics teachers can find real-world examples that will be interesting to their students."
Helping students gain understanding and self-confidence in algebra. Link categories include: preliminary topics, beginning algebra topics, intermediate algebra topics, advanced algebra topics, solving word problems, and an appendix.