I grew up using Wordly Wise and now use these with all of my homeschooling kids. These books are amazing and not only help expand your child's vocabulary, but also help them understand use of words in context and their meanings. We use these daily and my kids vocabulary has expanded so much as a result.
The book has 10 vocabulary words and several different types of exercises to study these words and their meaning. One aspect that we did not anticipate was a method for teaching our child to go back to a story to look up answers. With the questions having highlighted vocabulary words and the stories having the same vocabulary words highlighted, a method for teaching our child to find information in a story just read is inherent in this cirriculum. A few short exercises are grammar that were unexpected, more in line with 4th grade, and not taught in the book. 99% of the book was excellent.