The Algebra Teacher's Activity-a-Day, Grades 6-12: Over 180 Quick Challenges for Developing Math and Problem-Solving Skills (JB-Ed: 5 Minute FUNdamentals)
“ Just as there is no loss of basic energy in the universe, so no thought or action is without its effects, present or ultimate, seen or unseen, felt or unfelt. ” ― Norman Cousins