It's not always easy to think about changing your approach to your practice when you're alone most of the time. One benefit to working in a center is having coworkers to learn from as well as to give you feedback.
Here is a video of a preschool teacher performing a read aloud. After she reads the book, she goes through the different techniques she used. Give this video a watch for some new ideas to incorporate into how you read with your children.
Tip: Short on time? Skip to the 8:00 mark to see the strategies she uses.