After revising the Rhyming Short Vowel Words And Sentences book, I'm working on the Mixed Short Vowel Words And Sentences book.  This book is used at the beginning of first grade. It is set up so that the class will cover short a, e, i, o, and u words completely (but not in that order) by the time they have learned/reviewed how to write all of the alphabet letters, studying one new letter per day. In first grade you have to "hit the ground running," so to speak, because there is so much to cover before the end of the year.  At the same time, you have to be sure that everyone can write the alphabet letters accurately and automatically and decode short vowel words with confidence so they will be successful when learning to read and spell words with phonogram patterns.  

I am revising the Rhyming Short Vowel Words And Sentences book.  I am removing the short i words from the introductory lessons.  The short u introductory lessons will remain the same.  Without the short i words, it is impossible to make sentences with just the short u words, so the sentences in the introductory sequence will be removed, too.
If you have already printed the books, you don't need to reprint them!! Just skip the introductory short i picture/word pages and  the introductory sentences.  
The reason for the change is that the short i sound is not easy to hear for beginning readers.  It is tempting to start with short i words because you can use the words is and I to put together sentences after just a few phonetic words have been learned.  My original reasoning was, "It's just one set of short i words."  On second thought, I think it's better to wait to introduce the short i words.  It's much easier for students to begin with short u words.
I've also added a spelling dictation chart to supplement the sequence chart.  
The main changes have been completed.  I just need to revise the instructions. Hopefully I will put the new version online within the next few days.