7th Grade Math: the teacher never made it past the if section before my son piped up with his question:

"If a person is doing two jumping jacks a minute at a constant rate of speed ..."

To which my son interjected, "So they were able jump higher than the Twin Towers and then fall that distance without dying and then do it again - all at a steady rate of speed?"

~Lisa
http://www.lisaabeyta.wordpress.com/