Mathematics activities and facts related to pi are presented in this issue of "Student Math Notes." Included are: (1) an exercise based on Buffon's needle problem in which pieces of toothpicks are dropped onto a ruled surface; (2) a calculation of pi to 200 decimal places; (3) exercises related to Biblical and ancient Chinese approximations of pi; (4) exercises related to algebraic representations of pi including a computer program written in BASIC which approximates pi using the Leibnitz series; (5) mnemonic devices for remembering approximations of pi; (6) a computer program written in BASIC which simulates Buffon's needle problem; and (7) several additional miscellaneous questions and facts about pi. (DC)