The Delaware Department of Education (DDOE) was interested in evaluating components of a statewide pilot program to support instruction in World Languages (particularly Spanish and French). The first component was an online student assessment, the Standards-based Measurement of Proficiency (STAMP) to measure the learning outcomes. The DDOE also wanted to evaluate their professional development program which consisted of the combined use of STAMP and ClassPak, an online teaching tool. Both STAMP and ClassPak are products and trademarks of Language Learning Solutions. This study is a replication of a previous attempt to evaluate the effectiveness of the DDOE's professional development program for World Language instruction. The question specifically addressed in this study is whether students in classes of the teachers who received the professional development and were given access to the ClassPak materials will perform better in reading and writing in Spanish or French, as measured by the STAMP, than they would if they had been in a control classroom. (Contains 17 tables and 3 footnotes.)