You must present evidence of your ability to work on a wide range of visual problems. The solutions to these problems should demonstrate that you are able to explore advanced concepts as a result of your experimentation with a broad range of alternatives. Students are required to indicate on the slide the principle or problem it addresses. Each college will have specific requirements for your portfolio presentation. They may require slides, photocopies, images on disk or a personal interview and critique of actual works.
Some schools actually require an on site drawing performance.
I will be happy to assist you with the preparation of your college and AP portfolios. I ask only that you plan ahead. Please make arrangements with me several weeks before you need the completed portfolio. The highest quality slides are taken in full sunlight. We often wait days for the sun to accommodate us and several days are often required for film developing.