Studies that discuss the basic concepts of teaching mathematics include teaching mathematics in the 21st century, the nature of doing mathematics, teaching mathematics through problem solving, planning problem-based classrooms, evaluation in mathematics learning, teaching mathematics fairly for all students, using technology to teach mathematics, developing number concepts and sensitivity to numbers and their operations, algebraic thinking, teaching the concept of fractions, developing proportional reasoning and geometric thinking. The assessment is carried out by involving student activity through assignment presentations and in-depth discussions of the main material. The assessment activity ends with a discussion of the discussion and reflection activities.