A proven program for enhancing students' thinking and comprehension abilities Visible thinking is a research-based approach to teaching thinking, begun at Harvard's Project Zero, that develops students' thinking dispositions while at the same time deepening their understanding of the topics they study. Rather than a set of fixed lessons, visible thinking is a varied collection of practices, including thinking routines, small sets of questions, or a short sequence of steps as well as the documentation of student thinking. Using this process, thinking becomes visible as the students' different viewpoints are expressed, documented, discussed, and reflected upon.