Includes Student Guide. The Model SC-300R is an in-depth exploration of the electronic components included with the SC-300 Snap Circuits. Ideal for use in home schooling, middle schools and high schools, where students will grasp the basic principles of elec- tronics. The TG-300 Teacher Guiede includes: Two project books and student guide included. Teacher guide sold separately (See Below). Topics Covered: Resistors, capacitors, transistors, motors, series circuits, integrated circuits, parallel circuits, switches, batteries. Ages 8 and up. Requires 4 “AA” batteries