DK Workbooks: Spelling, Pre-K, 

For children ages 3-9, each leveled workbook is packed with activities and challenges, offering the beneficial repetition and cumulative learning that lead to mastery. Fact boxes on each page give a simple overview of the topics being covered, review the basics, and often offer an example of the task at hand. The exercises themselves reinforce key spelling topics, including: vowel sounds, syllables, irregularly spelled words, reading simple sentences, and more.