The accuracy with which regression models estimate treatment effects is dependent upon a number of conditions. The stability of the regression line (a function of sample size and correlation between pretest and posttest) is said to be the most important of these conditions. The utility of regression models is proportional to the size of the…

This report describes the implementation of the Language Education Acceleration Program (LEAP) of Medford, Massachusetts. The program is evaluated. The administration of the program is discussed. Pre and post test results are given and analyzed for the Metropolitan Achievement Test, Stanford Early School Achievement Test, phonics, structural…