What are the ethical implications in the following scenario? Do you believe that this teacher acted unethically in this situation? Why or why not?

Scenario- A spelling bee competition is planned for tomorrow in which all the students in each class must participate. The teacher has three students who are English language learners. The teacher really wants to win this bee because she is a candidate for her school's Teacher of the Year award. The teacher casually mentions to the three students that tomorrow would be a great day to stay home and enjoy the new-fallen snow because it's Friday before winter vacation and they won't miss much.