OpenSciEd
Open Sci Ed: 8.3 Forces at a Distance
This unit allows students to investigate the cause of a speaker's vibration in addition to the effect.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Introduction to Magnets (Classroom Unit)
A teacher unit which includes several hands-on activities about types of magnets, magnetism, and electrostatics. An activity designed to suit all grade levels. Many parts of the activity would be easily adaptable as a student project.