Use this powerpoint presentation to present students with directions to make a 4 flap foldable to teach how to solve for pH, pOH, [H+] and [OH-]. Customized directions are given based on whether students are using a graphing or regular scientific calculator. Students take extra care to make their flip notes neat and accurate and it is a more engaging way to take notes. Some teachers let students use their flip notes on tests and quizzes. The slides can be edited to fit the way that you teach concepts.