Chinese history (Tang, Song, Liao dynasties), global middle ages, sino-steppe relations, aristocracies, meritocracy, elites, political culture, death ritual, premodern cities, premodern empires, imperialism, ethnicity, nationalism, national identity, social networks, frontiers, boundaries and borderlands, digital methodologies
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Problem solving, knowledge representation & reorganization, explanatory coherence & inference, conceptual change, societal implications, science instruction, global climate change psychology, numeracy in journalism, naïve/informal physics, computational models of cognition, perceptual-cognitive interactions, intelligent tutoring systems, understandings of biological evolution, Reasoning, qualitative & quantitative thinking