A behavior modification program was developed and implemented to decrease the tardy behavior of 20 middle school students (ages 13 to 15) in a self-contained dropout prevention class. Student interviews revealed that the students were unable to manage their time, were not motivated to attend class, and did not find class rewarding. The intervention program included the following components: (1) daily time card sign-in; (2) points for prompt attendance, exchangeable for rewards; and (3) a time-management workshop to teach new strategies to save and manage time. Success was measured by comparing attendance data across 7 weeks of program implementation. Knowledge of time-management strategies was determined by administration of a post-implementation survey. Students also designed their own time-management plans. The program's success was demonstrated by: a change from an average of 15 tardies per week to zero tardies for the last 3 weeks of the program; all students were able to identify time-management strategies 4 weeks following the workshop; and all 20 students received rewards for timely attendance during weeks 5-7. The time management questionnaire is appended. (Contains 12 references.) (DB)