Student doesn't like transitioning into a subject like math. Teacher quickly and effectively redirects the student by acknowledging another, more fun activity that will be taking place after the math lesson is over.
Class we are going to transition now into math. Please, quietly, put away your ELA materials and get out your math books.
Ugh! I hate math! It is so stupid!
Tommy, would you please come over to my desk?
I'm sorry that you don't like math too well. I have a very fun activity planned for everyone when we are finished with this lesson. Do you think you can finish this lesson so that we can get to that activity?