On understanding, learning, and teaching problem solving MATHEMATICAL DISCOVERY：On understanding, learning, and teaching problem solving Understanding learning and teaching Understanding, assessing, and teaching reading : understanding, leading, and enacting change Mathematical Discovery-on Understanding,Lerning,and Teaching Problem Solving 并列题名：Understanding learning and teaching 书名原文:Mathematical Discovery-on Understanding,Lerning,and Teaching Problem Solving 并列题名：Mathematical Discovery-on Understanding,Lerning,and Teaching Problem Solving understanding, teaching, and counseling gifted students