List matchKey CL help

How do I define the list matchKey? I want my students to be able to check their list order from screen 1 on the next screen (#2), but each time I test it out, it tells me my order is incorrect.

I’ve been googling and found several examples of list sort CL self checks and have copied the CL layer, but none are working for me.
Any suggestions appreciated!

You’ll need to take out the correct sink line in your Ordered List component CL. The easiest way to be sure that answers will be correct is to put your list in order to begin with, making it the answer key, and check the box under the 3 dots in the upper right corner of the component. Desmos will randomize the order automatically for the activity.