This is the fourth topic in the series of lessons on math provided by DeafTEC. Gary Blatto-Vallee, a math and science instructor at the National Technical Institute for the Deaf, guides viewers through a variety of mathematical exercises in this DeafTEC video series. All lessons are fully captioned, signed in ASL, and voiced. In this fourth section, six videos teach students how to work with exponents including the power and product rules for exponents and negative exponents. See the main Math Video Resources page for an introduction to this video series.