Another good idea is to hand out a pop quiz and announce that this is a test. Make funny questions appropriate for their level Write the directions that says please turn over the test without doing any examples. MOST GIRLS WILL NOT READ THE DIRECTIONS AS THE INTERESTING, AND FUNNY QUESTIONS WILL CATCH THEIR ATTENTION.
So make a interesting and fun test for example:
1. What is the name of the girl sitting next to you?
2. List the posters in the classroom
3. Draw a complicated maze ..etc..
The game will be how many students will pick up on the fact that you are not supposed to actually fill it out..