Today I wore my pedometer to see how many steps I walk. It's not even 5 pm, and already I've walked my 10,000 steps! Now according to my pedometer, 10,000 steps is about 5 kms, not 5 miles. It depends on stride length, and stride length is measured from the tip of the toes on the forward foot, to the tip of the toes on the back foot.
Just from my car to my first class of the day and back is about 2500 steps. From my first class at one end of the building, to my second class at the other end of the building, and back to my third class is about 1300 steps. Plus the steps to the cafeteria, library, etc. quickly adds up to about 5000 steps. So that's an easy minimum for me ... by noon each day! That's all wearing a 15 lb backpack too.
BTW - for those who are thinking, "who cares about walking", just keep in mind that cycling is doing nothing for your bones. Weight bearing exercises, like walking, are the way to build up strong bones and reduce your chances of osteoporosis.