Useful teaching technique

If I have a concept that I really want my students (high school algebra 1) to remember, I will occasionally deliver the key point while standing on my desk.  It's a simple thing, but they will ALL be looking at you while you are up there.  I have a schtick that I do every year when I'm teaching them the idea "Whatever you do to one side of the equation, you do to the other".  I was inspired by my high school composition teacher who taught me the immortal phrase "You can't write what you don't know" using a similar technique.  I explain the tribute to my high school teacher, then I repeat the phrase to be learned while I am in places they don't expect to see me.  I usually go out in the hall, peek around the door frame and say the magic phrase.  Then I hide behind the desk, peek over the top and say it again.  Other things may make more sense in your classroom, be creative :-)  I finish by climbing on the desk and doing a little call and response routine with them "okay, first this half of the room, repeat after me..."  You get the idea.  They don't forget this and it's fun.