Vocabulary Stretch ( Grades 4 through 6 ): Home Version Self-paced, interactive, software that helps improve students vocabulary Assessments place students in appropriate lessons. They receive instructional feedback throughout. Scores are automatically kept in an easy-to-use record management system. For U.S. grade levels 4 though 6 (ages 9 and up). Suitable for English language learners and older students who need a review.