Curated OER
What Would You Take to Sea? Instructions for Teachers
Students, who are teachers, discover the hazards facing sailors hundreds of years ago as they prepare a instructional activity to use in their classroom. They examine what each group of students will investigate, and how the findings...
National Council of Teachers of Mathematics
Nctm: Figure This: Bar Codes
An exploration of the binary system using U.S. postal zip codes. Discover what numbers the long and short bars in a zip code represent in this one page activity from the NCTM Math Challenges for Families collection.