Watch the video below, which sets the stage for the AP Computer Science A.
Note: the "AP Computer Science Teacher's Guide" is no longer send in hard copy since the AP CS A exam has changed since the document was published. It is still available from the College Board for download at https://secure-media.collegeboard.org/apc/ap07_compsci_teachersguide.pdf. While this document is a little dated, Appendix B is a great resource for two dimensional arrays, searching, sorting, and recursion.