To learn how to make focaccia that’s perfectly crisp and chewy — or just how to get a loaf of cinnamon raisin to rise — sign up for two-hour bread-baking classes from the King Arthur Flour Company that will be swinging through the United States starting this fall (for a location near you, go to www.kingarthurflour.com). Can’t get there? Try one of the king’s online classes on subjects like making airy ciabatta and achieving the holy grail of the holidays: a flaky piecrust.