Reading comprehension and clear communication are marked by a strong vocabulary. Spectrum Vocabulary for grade 4 is a workbook packed with progressive lessons that help children learn words through prefixes, suffixes, word relationships, and context clues. --Strong communication can be applied across disciplines, and is essential for success in and out of the classroom. Spectrum Vocabulary for grades 3-6 helps children systematically build their vocabulary while improving comprehension skills. This best-selling series teaches strategies for test success and helps children understand that words matter!