ABSTRACT : Costa proposes five themes about thinking and learning that educators should consult in choosing curriculums that encourage deep, skillful thought: 1.) learning to think; 2.) thinking to learn; 3.) thinking together; 4.) thinking about our own cognition; and 5.) thinking big. Teachers, he argues, need to continually examine and evaluate their curricular choices to be certain they are giving students practice in thinking with depth; engaging students in authentic, relevant activities that will stimulate deep thinking about content; showing students how to study their own thinking; guiding learners in thinking within groups; and promoting thinking big in terms of applying deep, creative thinking to world situations and problems.