Although research provides ample evidence of teaching methods that facilitate students' learning of specific word meanings, the potential of instruction to impact students' general vocabulary knowledge has remained an unanswered question. This article reports on a three-year formative experiment that developed, implemented, and tested a long-term,…

This article reports on a 3-year formative experiment involving the implementation and testing of a long-term, multifaceted vocabulary instruction program in fourth- and fifth-grade classrooms in three demographically distinct schools. The quantitative findings indicate that the students, across the 3 years of the project, showed accelerated…