The School at Steps, a division of Steps on Broadway, in collaboration with Dance Magazine, is pleased to present "College Day," a panel discussion on the topics of *college programs, *the application process, and *audition tips.   The panel will consist of representatives of Barnard, Goucher, and Marymount Manhattan Colleges, Boston Conservatory, The Juilliard School, Montclair State U, and The Tisch School.    A must for young dancers planning to attend college.