Curated OER
Can the Radon Problem Be Fixed?
Students 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...
Curated OER
Let's Go Shopping with $500
Third graders use a worksheet to budget a five-hundred dollar shopping spree. They select goods to purchase, figure totals and then calculate discounts and sales tax. They compare results to determine who purchased the most for his or...