Students compare and contrast simple machines and their functions. In this cross-curriculum science simple machines lesson, students observe examples and read about simple machines, then use body movement to demonstrate how machines...

The element lead is a neurotoxin that is particularly dangerous to young children. Among other uses, lead compounds were common paint additives until being phased out for safer titanium-based additives beginning in the 1960's. Lead...

This reading is an introduction to the great variety of steroids and their many different uses.