The O'Donnell Foundation is devoted to building model programs to enhance the quality of education.
Over the summer PhET will be hard at work upgrading our simulations for the new school year! Help support our summer vacation work and give the gift of learning by donating today!
|Guidance Recommended: This simulation is very effective when used in conjunction with a lecture, homework or other teacher designed activity.|
|Under Construction: This simulation is a preview version, and may have functional or usability bugs.|
|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.|
|Gold Star: This activity is identified as aligning with principles of education research|