This document discusses strategies for differentiating instruction for gifted students, including providing opportunities for higher-level thinking through depth and complexity. It defines depth as studying many aspects of a single topic and complexity as looking at relationships across topics or perspectives. Icons of depth include rules, patterns, big ideas, ethics, and unanswered questions. Icons of complexity involve change over time, relationships across disciplines, and multiple perspectives. Content imperatives for instruction include origin, contribution, parallel concepts, paradoxes, and convergence.