填空题
Block scheduling is (1) to do many positive things such as reduce truancy, make school (2) stressful, increase planning time for teachers, improve teacher-student relationships, and provide time for off-site work experiences at local businesses. However, the critical issue is (3) it does for actual learning. The desire for a (4) on academic achievement has been criticized by some proponents of block scheduling, (5) some parents feel that academic achievement is what public education is (6) The studies and trade articles that are used in (7) of block scheduling frequently base their conclusions on (8) criteria, e.g., many teachers enjoy it, kids seem to (9) having fun, the atmosphere is more relaxed, etc. However, proponents are unable to demonstrate academic benefits with hard, scientific data. On the (10) , the largest scientific study (11) objective student performance in block classes with student performance in full year classes found that the full year students outscored the block students (12) every measure. Dr. David J. Bateson of the University of British Columbia studied 30,000 10th grade students in British Columbia (13) took science courses in year-long or semester-long blocks. Students in year-long science courses significantly outperformed (14) those taking science in the first semester and students taking science in the second semester. Furthermore, Bateson's study (15) that first semester students had forgotten a significant amount of class material (16) the time they took the test at the end of the year, contrary to the popular myth (17) retention is not a problem. Considering that typical block schedules cause a gap of three to thirteen months between consecutive classes, (18) an average gap of 7 months, many parents (19) that students may have serious problems in classes which (20) on retention of material taught in the last course.