The Model SC-300R is an in-depth exploration of the electronic components included with theSC-300 Snap Circuits. Ideal for use in home schooling, middle schools and high schools, where students will grasp the basic principles of electronics. Two project books and student guide included. Teacher guide sold separately. Topics Covered: Resistors Switches Capacitors Series Circuits Transistors Parallel Circuits Integrated Circuits Batteries Motors Two project books and student guide included. Teacher guide sold separately. Custom Storage Case Each SC-300R comes with a lightweight, durable case with custom foam inserts to store all Snap Circuit parts. Easy to identify missing components. Requires 4 AA batteries, sold separately.