A cluster is a group of question pages. Within this cluster, you can require that the student correctly answers a number of questions before being allowed to proceed out of the cluster. This enables you to test that a student understands a concept before moving on.
Alternatively, you can display a random page from the cluster, and from that page, proceed to any other page in the lesson. This enables you to send each student down a different random pathway in the lesson so that not all students have the same experience.
A cluster consists of a beginning cluster page, an end of cluster page, and pages in between them.
