Labor day will soon be upon us. For most students that means school is about to start up again. With that in mind, Sillicon Valley Insider's compiled a list of ten iPhone applications -- educational tools and reference guides -- it thinks every student should have in his or her backpack. Selected apps include iStudiez Pro ($2.99), AlgebraPrep Series ($2.99 each), Convert - The Unit Calculator ($0.99), Dictionary.com (free), MyHomework (free), The Chemical Touch Lite (free), Simplenote ($1.99), Amazon Kindle App (free), Free Language Tutors (free), Snood ($3.99). See here for descriptions, download links and screen shots.