Mind-Stretching Units for Small Groups! Written by Barbara Doherty and Charlotte Jaffe. Exciting, thought-provoking, group-learning experiences foster higher-level thinking, improve problem-solving and communication skills, and encourage students to see things from several points of view. The flexible units (Inventions, Heroes, Endangered Animals, and Our Global Community) are easily adapted to meet size, time, depth-of-study, and other special needs. 64 pages. Grades 3 to 6.