Activity
ReadWriteThink

Read Write Think: Red Write Think: Celebrate the 100th Day of School

For Teachers Pre-K - 1st
Use the activities and resources in this lesson plan from ReadWriteThink to find ways to celebrate the 100th day of school.
Handout
Encyclopedia of Earth

Encyclopedia of Earth: Water Pollution: Groundwater

For Students 9th - 10th
Explains what groundwater is, how and where it occurs, how the quality of our groundwater is being affected by human activities, and the detrimental impact this has on plants and animals. (Updated: February 22, 2012)