Sponsor Utama
National Science Foundation
The O'Donnell Foundation is devoted to building model programs to enhance the quality of education.
Symbol Meaning
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Guidance Recommended: This simulation is very effective when used in conjunction with a lecture, homework or other teacher designed activity. |
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Under Construction: This simulation is a preview version, and may have functional or usability bugs. |
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Classroom Tested: This simulation has been used and tested in the classroom, and on multiple computer platforms. The simulation has been refined based on that experience and on student interviews. |
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Gold Star: This activity is identified as aligning with principles of education research |