A science teacher from Iowa is using sidewalk chalk to share colorful lessons on marine biology. ... "I made some coffee, took the extra chalk outside and just started drawing," he said.

PORTLAND, OR--(Marketwired - Oct 2, 2014) - Specializing in paint formulated without volatile organic compounds (VOCs), Colorhouse today announced its line of interior Chalkboard paint. Get Inspired - ...

In the study, 13 participants listened to 74 sounds, including nails on a chalkboard and the whine of power tools, and rated them according to their pleasantness.