23.5.1.1. The Jasper Series. In one of the most extensive comparisons of a REAL versus conventional instruction, James Pellegrino and his CTGV colleagues (1991) tested the Jasper series in 16 schools in 9 states. Two teachers and a corporate support person had responsibility for implementing the program over the course of the 1990-1991 school year at each site. Teams received intensive 2-week training in the program before implementation. The CTGV group developed assessment strategies to evaluate Jasper's main goals for students: (1) to develop critical mathematical problem solving and reasoning skills, (2) to develop an appreciation of mathematics as a realistic part of their world and everyday problem solving, and (3) to develop various sets of specific mathematical knowledge and skills.