Pupils devise the solutions to the radon problem. They consider how radon enters homes and the air flow patterns within them while focusing on the fact that the ultimate source of radon is the rocks and soils under the house. They...

Scholars imagine themselves as citizens of Pompeii in 79 AD. First they are assigned a job (or place in society like a child or slave). Then they record their daily activities for the weeks leading up to the eruption of Mt. Vesuvius in...