The constructivist revolution has deep roots in the history of education. This revolution relies heavily on the work of Piaget and Vygotsky as sources, both of which emphasize that cognitive change only occurs when the previous conception undergoes a disequilibration process because it emphasizes new information. Therefore, this study aims to 1) understand constructivism learning theory, 2) characteristics of constructivism learning theory, 3) understand the principles of constructivism learning theory, 4) determine the advantages and disadvantages of constructivism learning theory, 5) understand the stages of learning with approach to constructivism learning theory, 6) determine what learning models can apply constructivism learning theory, 7) describe examples of learning outside the network and in networks that implement constructivism learning theory, 8) understand about authentic assessment, 9) determine the types of learning the type of assessment in learning that implements constructivism learning theory, 10) understands the role of teachers and students in learning constructivism learning theory approaches, 11) describes the implementation of constructivism learning in Indonesia. The research method uses qualitative research methods (library research). Summary of Constructivistic theory emphasizes the principle of student-centered learning (student center). The conclusion from constructivist research theory is that teachers should not merely provide knowledge to students. Students must build knowledge in their own minds. Teachers just help provide the means and situations so that the students' knowledge construction process runs smoothly.