This article covers the Legacy editor. Lessons built in the New editor work differently. To add a resequence question in the New editor, see Adding a Resequence question to a lesson. New to the difference between the two? Start with The new lesson experience.
Adding a Resequence 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 Resequence. Its description in the dialog reads "Students drag items into the correct order".
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.