For our Essentials program, Chart A is our foundation. (You will only get that play on words if you're a CC homeschooler). Chart A has us memorizing all the essentials of English Grammar (parts of speech; sentence structures, patterns, and purposes; basic skeletons to diagram sentences; and more). My children have had this information memorized for awhile, but recently I've decided they need to take their knowledge and apply it. Rather than just knowing the Four Structures of sentences, I've wanted them to be able to tell me that a compound sentence is two independent clauses joined by a coordinating conjunction. Then, I want them to give me an example of a compound sentence. Rather than just listing off the Eight Parts of Speech, I want them to define for me (with examples) a noun, a pronoun, an interjection, etc.
To help them with this task, today we whipped up this little memory book full of information from Chart A. We have the basic framework of the chart spelled out on different colored paint swatches (thank you Walmart!). We then added definitions, examples, and even pictures to help us remember what these elements of grammar are and how they are used.