The Washington Pre-College (WPC) program decided, in fall 1967, to inaugurate in April 1968 the testing of high school students during the spring of their junior year. The advantages of this shift from senior year testing were to provide guidance data for earlier, more extensive use in high school and to make these data available to colleges at the time they actually make admissions decisions. Because of this shift, statistical changes were required in scoring and prediction formulas. This report summarizes the following three changes: (1) generating standard score weights for the quantitative skills subsections; (2) restandardizing high school means and standard deviations of the WPC tests; and (3) conversion formulas translating WPC raw scores into standard scores, and composite score formulas and derivations. (Author/HH)