Purpose: A pilot study of the "Language, Literacy, & Vocabulary!" program was conducted by Learning Gauger, Inc., for National Geographic School Publishing, in spring 2006. The program evaluation examined the classroom adoption approaches used by participating teachers and the subsequent impact of the "Language, Literacy, & Vocabulary!" (LLV) program on students' content area literacy development. The LLV program provides curriculum resources for vocabulary and comprehension development through study of academic content. Materials are designed for multi-need instruction of English language learners, at-risk readers, and special need learners. Methodology: The study was conducted in urban Illinois public schools with 259 students in 4 schools, 90 students in the treatment groups and 169 students in the control groups. Classes of students were assigned to treatment or control groups. Pre- and post-test data from students provides insight into how effectively the "Language, Literacy, & Vocabulary!" program improves students' content area literacy. Teachers in the treatment classrooms taught 3 to 6 units and used a wide variety of LLV instructional tools and assessments with students on a daily basis. Weekly units were taught in a continuous duration. Results: A thorough analysis of the data collected indicates that the students in treatment groups made statistically significant gains in their content area literacy development compared with student who did not use the "Language, Literacy, & Vocabulary!" curriculum. In each curriculum group, the mean improvement from pretest to posttest was substantially higher for the students in the treatment groups. In addition to gains on the pre- and post-test, student groups who used the "Language, Literacy, & Vocabulary!" program showed considerably less variance and were more consistent in their literacy growth compared with the wide ranging variance, including frequent negative gains, among control group students. Appended are: (1) Test Validation; (2) Descriptive statistics by grade level; (3) Group frequency charts by grade level; (4) Histograms; (5) Focus Group Questions; (6) WOL Survey; and (7) RE Survey. (Contains 17 tables.)