malia obama is already visiting schools and will attend college in fall 2016 .
11th grader , 16 , goes to private sidwell friends school in washington , d.c.
she has already visited schools like harvard , stanford , columbia and yale .
president obama said he 's ` sad ' and he tears ` up in the middle of the day '
malia 's younger sister sasha , 13 , has more time until she considers college .