It is essential in communicative situations for teachers and students to have comparable percepts. A paucity of information is available on the percepts held by children regarding quantities and intervals of distance, height, weight, time, temperature and volume or on improvement (if any) that occurs as children mature. Teachers cannot be…

Results are presented of a study determining the effects of type of junior high school science program on science content achievement and science process achievement in the presence of reading achievement, mathematics achievement, and sex. Two groups of ninth-grade students (N=50) were randomly selected to participate in either an ISCS program or…