The 12-week program described here was designed to improve a Hebrew language immersion class' ability to correctly use the simple past and present tenses. The target group was a sixth-grade class that achieved a 65.68 percent error-free rate on a pre-test; the project's objective was to achieve 90 percent error free tests, using student participation in such tasks as problem-solving, games, and role-playing, all within the context of peer teams and cooperative learning groups. The tasks were student centered, and all involved use of student-generated materials. The grammatical skills to be mastered were presented to the students as meaningful and comprehensible input linked to specific content areas such as Bible study and Jewish social studies. The students practiced the skills and exhibited linguistic competence by producing output that was also linked to the content areas. Student achievement throughout the study was measured by teacher- and student-designed performance-based assessments, the results of which were assessed by both teacher and students. Final results were assessed by teacher-designed written and oral posttests. The program objectives were met by the target group. Appendixes include materials used in the program and the pre- and posttests and results. (Author/MSE)