DALLAS — A few minutes before 8:45 a.m. Tuesday, Shelley McClellan was in the hallway at Allen High School, greeting students as they straggled into her first period English class. As students settled ...
Twenty years after the introduction of the theory, we revisit what it does—and doesn’t—explain. by Clayton M. Christensen, Michael E. Raynor and Rory McDonald Please enjoy this HBR Classic. Clayton M.
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