Curated OER
Muddy Waters
Students read the book the Dirt Boy. In this design and problem solving lesson plan, students create a way to clean muddy water. Students give their ideas and discuss them. The teacher shows a filter and demonstrates what it does to the...
Other
Rensselaer Polytechnic Institute: Leaching
An informative site describing the process of leaching, including links to diagrams which illustrate the process. The health risks posed by leaching are touched upon.