In his first nine years as a teacher, Brendan Halpin goes from wide-eyed idealist to cynical, heartbroken idealist. Unique among teaching memoirs, Losing My Faculties is not the story of a heroic teacher who transforms the lives of his hardbitten students; rather, it's the inspirational and often unpretty truth about people who choose to get up ridiculously early day after day and year after year to go stand in front of teenagers. It's also a rarely seen all-access view of both suburban and urban education, including the ugly truth behind the mythology at a much-hyped charter school.