The CREST+ model, a model for writing effective online discussion questions, covers the cognitive nature of the question, the reading basis, any experiential possibility, style and type of question, and finally ways to structure a good question.  This model encourages students to participate in online forum discussions, provides a template for new online faculty to use in creating effective discussion questions, and promotes a higher level processing of the material.

The CREST+ model covers the cognitive nature of the question [C], the reading basis [R], any experiential [E] possibility, style and type of question [ST] , and finally ways to structure a good question [+].