So... we use Mud Walk to teach expression and it takes about a week. Do you have this book? Maybe it's in your guided reading library (level H). This book has everything you need to show examples of great expression (exclamation points, question marks, bolded words, quotation marks, etc.). I go through the book at read it with great expression and then I read it like a robot. I tell my student we don't want to sound boring like robots and then I start with the first concept.
Over 5 days, we go through how to read:
*a period
*an exclamation point
*a question mark
*a comma
*quotation marks
*bolded words
Luckily, I have a step-by-step list for you {5 day lesson}.... here's an example of what you can download for free! :)
I use the posters from my Punctuation Perfection {freebie} to show each punctuation mark. I also use highlighter tape to highlight each part.
Example of one of the posters: