<p>Undergraduate Business Administration 10 must be taken at UC Berkeley. ([Source](<a href=“http://www.haas.berkeley.edu/Undergrad/ucb_prereq.html]Source[/url]”>http://www.haas.berkeley.edu/Undergrad/ucb_prereq.html)</a>) It doesn’t seem to be offered during this summer and I doubt that the university would allow you to stop by campus to take it as a high school student. It isn’t possible for you to apply directly to Haas without pulling serious strings.</p>