I agree...Definitely a watch... but then again, I feel naked without my watch at ANY time.
I wouldn't walk into a classroom without a
backup plan !
I always have a basic lesson plan with the necessary materials for THAT lesson... and a few other ideas or materials which I probably won't use but have the option to use if needed... example, the first activity ended faster than expected or if things don't pan out as expected

and I need a quick change of pace... all-engines-stop !

and pull out the backup plan.
