I use this twist on a KWL to help my students practice academic vocabulary for our unit study. I list the words they need to know in the first column and have them define what they "think" they mean in the second column. I then have them work with partners (either ones I have selected or ones they choose - up to you) to look in dictionaries or their textbook to find the answers. We then review as a group.
This is completely editable and can be used for any subject or grade.