I have taught the braid Runner (table Runner() for begginers. It is a quilt as you go. They will learn 1/4 inch sewing, cutting, accuracy, color choices, binding, & hand sewing (for the binding). it is important to give a supply list. Each person should know how to use the basics on their machine. It is straight sewing and they will feel great at accomplishing something.
The other project I taught was the tossed nine patch, by Eleanor Burns. It is simple and goes quickly. Will also learn alot of basics.