This is a glue in. You should go over with students when gluing in so that they understand how to use it properly. As you can see in my picture example, students highlight and differentiated between the fact from the text and the actual elaboration so that they can see how that type of elaboration is used. Students also wrote notes beside the examples to further help them.
My students use this EVERYDAY when writing. :)
Elaboration examples given:
Real Life Example
Making a Connection