This article covers the Legacy editor. Lessons built in the New editor work differently. To add a reflection prompt in the New editor, see Adding a reflection prompt to a lesson. New to the difference between the two? Start with The new lesson experience.
Adding a Reflection block
Open the lesson from My Library. The Legacy editor shows the lesson as a list of blocks, with the Outline down the left.
Click Add block at the bottom of the Outline.
Choose Reflection. Its description in the dialog reads "A prompt for self-reflection, not graded".
Fill in the block, then Click Save when you are done.
You can reorder blocks by dragging them in the Outline, and delete one from its own menu.