Watch this video of Lexi coming down the hall after going to get a drink. The teacher tags Lexi when she puts her foot on a dark tile on the way back.

• Do you notice any difference in the way Lexi walks down the hall on the way to get a drink compared to the way back?

• Do you think the tag is a reinforcer for Lexi?
• How do you know?

• Record your thoughts on this in your journal entry.