Rug hooking should be done in a frame which should not be too large as the work needs to rest in the lap with one hand and the hook on top and the other hand and wool strip on the bottom. A 14" - 18" embroidery hoop might be a good choice for beginners. The goal of the frame is to keep the base fabric taught and the grain lines straight while hooking the rug. "Rug Hooking Online" has an excellent article on frames.