PIAGET'S THEORETICAL FORMULATION OF THE DEVELOPMENT OF CONSERVATION OF CONTINUOUS QUANTITY WAS EXAMINED. CONTROL SUBJECTS IN EACH OF TWO AGE GROUPS (5 AND 6 YEARS) WERE GIVEN A COMPLEX TASK SITUATION THAT IS TYPICAL OF PIAGET'S WORK. THESE SUBJECTS WERE ALSO GIVEN ANOTHER TASK, A MEASURE OF CONSERVATION OF QUANTITY THAT IS INDEPENDENT OF PIAGET'S…

The Pre-Kindergarten Component, part of the Language Development Component funded under Title I of the Elementary Secondary Education Act of 1965, served 677 four-year-olds in 21 Title I schools. The design of the component was based on the assumption that many pre-school disadvantaged pupils have underdeveloped potential in many areas necessary…