A red knot is a tiny shorebird that makes an epic 9000-mile journey all the way from the arctic to the tip of southern Chile and back. Biologists and nature enthusiasts congregate at various points ...

Psychologists have found that use of certain objects for counting have mixed results with preschoolers, particularly if those objects are rich in perceptual detail (bright and shiny). Concrete objects ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Hello! Today we are learning how to use numbers to count a collection of objects. Let's try seven. When ...