I recently read an article McCandliss et al. (2003), attached below, that describes an instructional routine called Wordbuilding.  If you've ever taught reading you may have done some form of this, it's sometimes called "chaining" in the classroom.  In an Orton-Gillingham based lesson you could use something like this in the blending drill section.  

Wordbuilding lessons are "sequences of words in which there is progressive minimal contrast from word to word" (Beck & Beck, 2013).  This is an academic way of saying that each word differs by only one letter: fan, tan, tap, top, etc.  This draws students' attention to each letter in the word which facilitates full alphabetic decoding as opposed to only forming a partial representation of the word.  I immediately bought Beck & Beck's  (2013) book (pictured left) for two reasons:  

1. I am tired of coming up with my own word lists for chaining, and this book provides 94 lists!  Yes, 94 lists that target different phonics patterns!

2. I thought this would be a wonderful activity for a paraprofessional to conduct with students.  

New on Teachers Pay Teachers. Plays on Words is a book of one-page, “mad-lib” style vocabulary skits with an emphasis on developing oral language and high frequency vocabulary. The plays are designed to give students lots of repetition of new vocabulary in an engaging, interactive format unique to Plays on Words. After providing direct instruction on a high frequency vocabulary word, I have used this with middle school and high school students for an engaging practice or review activity.  Download your free sample below!