What happened over the coming days is that my students fanned out. Some shot ahead because they found the initial concepts quite easy. Others needed to hunker down to really grasp them. My students differentiated their own instruction. They worked at their own pace, since they chose their own resources. They could do extra work at home if they felt it necessary.
I talked to every student every day. I could look at their work, have them articulate their thinking process, and see where they were struggling. I could spend time helping those who really needed it.