Good teachers have always known that puzzle games are some of the best ways toget old and young alike well on their way towards mastering a subject area. ProProfsis dedicated to the mission of combining education and entertainment, providing freeonline puzzles, brain games, and other fun resources to get people actively involved inthe learning process.
Richard Byrne's explanation. Sometimes I include his links instead of direct to the site because he gives explanations and suggestions for use. Some of these could be used for Breakout clues