123D Circuits is a free tool from Autodesk and Circuits.io (reviewed here) for collaboratively designing electronic circuits online. On 123D Circuits you can design your circuits and test them on the simulator in your browser. You can create circuits from scratch or use and modify templates and other publicly shared projects. All projects are public unless you pay a subscription fee to make your projects private. Watch the video below to learn more about 123D Circuits.
Applications for Education
123D Circuits could be a great tool for students to use to design and test circuits before moving on to creating them with real components in your classroom.
Click here for seven other resources you can use to teach students about electricity and circuits.