This unit is designed to acquaint middle school students with Pascal's Triangle. The unit is intended to be completed in small groups with a minimum of teacher direction. Students complete the activities by using manipulatives, calculators and computers and then report the results to the teacher and the class. The activities include: (1) patterns and puzzles with colored rods; (2) "random" walks with a street map; (3) coin toss investigation; (4) explorations with subsets; (5) explanation of Pascal's Triangle; (6) probability with dice; and (8) extensions on some of the activities. Teacher's notes, with answers, and a reference list accompany the unit. (PK)