1. Teacher transitions can disrupt time flow in classrooms;Arlin;American Educational Research Journal,1979
2. The leveling effect of teacher pacing on science content mastery;Arlin;Journal of Research in Science Teaching,1976
3. Ability grouping, content validity and curriculum process analysis;Dahloff,1971
4. Academic work;Doyle;Review of Educational Research,1983
5. Secondary school science;Gallagher,1985