"There is no exit, sweetheart." James said sarcastically, rolling his eyes. He didn't bother getting up from his chair, knowing that with a single, 'No', he could get Rose to stay. "See, how it works is simple. I'm strong, you're a pushover. Got that?" The nurse nodded silently, and he grinned. "Got it. Now, here's the thing. I'm bored. You'll stay, and I'll continue to hit you, and everything will be simply /perfect/. Now run along, doll, go starve yourself or something."
This is a different way to use the stoplight. Use it as an exit slip. Students put their name on a sticky note and then place it on green (I've got it), Yellow (almost there) or Red (I still need help).