Cut the Knot
Cut the Knot!: What Is a Number?
Casual and clear but definitely upper-level discussion of rational, real, imaginary, and several other types of numbers. Links to related sites.
PBS
Pbs Kids Afterschool Adventure!: Operation: Measuring How Much Activity Plan
Measuring fun is here! In this week's adventure, children will explore volume, capacity, and weight and learn new math vocabulary words as they practice measurement with real and virtual measuring tools. Each section of this weeklong...
PBS
Pbs Kids Afterschool Adventure!: Operation: Martha's Stem Stories Activity Plan
Welcome to Martha's STEM Stories! STEM stands for science, technology, engineering, and mathematics. You may already know that doing STEM means testing ideas, collecting data, making calculations, and drawing graphs and charts-but you...