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Earth Day is around the corner - April 22nd - and every year teachers and students try to come up with new and innovative activities. Recycling is a popular activity to keep the idea recycling going strong. Classrooms often come up with ideas to recycle paper, ink cartridges, plastic bottles, metal cans, and newspapers. However, there are other recycling activities that students can get involved in to support Earth Day.

How many times have you prepared an updated or new dynamic math or science PowerPoint or Keynote presentation for class and it would not open in school? Also, how many times has it happened to your students when it's time to give a class presentation? Now you need to postpone their presentation to another day, disrupting even the best planning.

Although it is not obvious to the casual observer, rocks absorb water. You can ask your students to observe rocks all day long and they will not be able to tell if the rocks they are observing are absorbing water. However, there is an investigation which allows students to discover that rocks absorb water and how much water specific rocks absorb.