Linda Ann’s Answer
Work with the Career Counseling office at your university to find part-time employment. There might be something at your school that would be suitable. ALSO, volunteer your time (now) with a faculty member who is doing research at your university. You will gain invaluable experience as a research assistant. Additionally, many students are eventually hired by a faculty member - part time during the school year - to work on their projects.
The City of Philadelphia often offers part-time jobs to high school and college students. Go to the website www.phila.gov to search for current vacancies. Go there every two weeks. ALSO, contact your City Council representative and State Government representative - they may also offer part-time work to city residents.