This is the perfect activity for your first classes as an Assistant Language Teacher (ALT) in Japan.
It works best with 5th and 6th grade elementary school students, but I've used it with Junior High as well.
Just pass out the name plates and have the students right there name in English. Or one side in English and one side in Japanese. This will help you remember their names MUCH easier, which leads to better classes through out the entire year.
Have more fun!