The author estimates that a minimum of 3600 additional mathematics teachers and 1800 additional science teachers will be needed at the secondary school level over the next several years. Each of the following trends is discussed: (1) increases in high school graduation requirements will increase the need for mathematics and science teachers; (2) declines in high school enrollment will decrease the need for mathematics and science teachers; (3) enrollment in teacher training programs for mathematics and science teaching is likely to decline; and (4) mathematics and science teaching is likely to become less attractive in comparison to other careers. Of these trends, the author believes that the one with the greatest potential impact is the trend toward increasing high school graduation requirements. However, new teacher demand created by this trend will be somewhat offset by decreases in secondary school enrollment. (MNS)