Four pictures, no single right answer. Students pick the odd one out and defend it by naming what the other three share. Every picture can be the answer with the right reason.
Add four pictures: type an emoji or upload an image. Give each picture a word, then list reasons it could be the odd one out. Each reason works best as a comparison: what the other three share, then how this one differs, split by a bar. Start the line with a lens name and a colon to tag it, for example Grammar: You get ON them: a bus, a plane, a bike. | You get IN a car.