Sorry I've been neglecting my P.E. peeps somewhat.
Greg Thompson, an elementary P.E. teacher from Wisconsin, did a presentation at this year's GAIN on his 5-in-5 concept. It is based on Dr. John Ratey's SPARK concept:
Dr. Ratey's concept is that daily vigorous exercise improves cognitive function. My only issue is that is very technology dependent, narrow scoped, & difficult to implement in most typical school settings.
Greg amped it up by developing a series of exercises that can be done in limited space- even in a classroom, with no equipment, and is easy to administrate. It is a series of 5 exercises performed in 5 minutes, repeated at regular intervals throughout the day. It involves squatting, pushing, pulling, rotating, balancing, reaching, hopping/jumping. There's no reason to stare into some heart rate monitor, it's very clear you are above 120 beats per minute.