Columbia Summer Session for College Students?

<p>Does Columbia University offer any summer session classes for students that are enrolled at other schools and have not been accepted to attend Columbia during the upcoming fall semester? I know that Yale does this and to attend either school during the summer would be very nice, as it would hopefully raise my GPA while earning me more credits and also giving me a taste of what I'm working very hard to transfer into (I never had a chance to visit either school, even during high school, as I am in Kentucky). </p>

<p>If anyone has any info about this please post.</p>