Ed Koday
Web Archive: Antlion
Have you ever heard of a "doodlebug"? Well, you're looking at one right up above! It is actually an insect called an antlion. The antlion gets its name because it is a voracious predator of ants and other insects. Actually, it's only the...
Better Lesson
Better Lesson: Exploring Circumference
What is pi, anyway? Students explore the relationship between circumference and diameter by measuring a variety of circles and use it to derive the formula for circumference.
Curated OER
Web Gallery of Art: Boy Holding a Flute (Hearing)
An image of "Boy holding a Flute (Hearing)", created by Frans Hals from 1626-28 (Oil on circular panel, diameter 37,5 cm).