123D Circuits is a free tool from Autodesk 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.

Autodesk recently published a short playlist of videos containing demonstrations of how to use 123D Circuits for various tasks. Short engineering lessons are included in the second half of the videos. Embedded below is one of the videos about designing a circuit to light an LED.

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.