This is one video 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 13:19 video, Blatto-Vallee uses an electronic whiteboard to show several examples of how to factor perfect square trinomials. See the main Math Video Resources page for an introduction to this video series.
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