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Grades 3-12

The place for hands-on math and science activities and games. These interactives were made possible by the folllowing contributors.

PLEASE NOTE: The Microscope Interactive has been removed from Knowitall.org. The activity will be revised to clarify the instructions about using the high power objective. After switching to the high power objective, only the fine focus should be used to focus the image - to avoid the possibility of breaking a slide. We regret any inconvenience. 

 

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