For something more on the cool and casual end, consider this combination of a white long sleeve shirt and khaki chinos. Complete your getup with black chunky leather loafers to immediately amp up the style factor of any look. This getup should inspire anyone who wasn't sure about dressing sharp as a teenager.
A white long sleeve shirt and khaki chinos are the kind of a foolproof casual ensemble that you so desperately need when you have no time to pull together an outfit. Go ahead and grab a pair of black and white canvas low top sneakers for a fun touch. More elegant combos like this look well on teen boys.