I use this lesson to begin my adding and subtracting fractions. It is set up using the Gradual Release of Responsibility model.
This lesson is dealing with like denominators since it is an introduction (or refresher, depending on your students). The portion of the lesson with the fraction bars is the point at which my students and I work together to make our own fraction bars out of construction paper. They make two sets; one for school and one for home. The making of these typically takes an entire math block but I feel it is critical for them to visualize and create various fractions in order to be able to do any work with them, especially comparisons. I use the curriculum workbook for classwork and homework with this lesson. Based on their performance during the lesson, I can adjust my guided math groups.
Image credits are at the end of the lesson.