“…Activities of active learning are diverse: modeling (finding a mathematical representation for a non-mathematical object or process; Freeman et al, 2014), seeking analogies (e.g., a triangle in a plane is analogous to a pyramid in space), providing/finding examples and counterexamples, independent solving of open problems (insight into problem situations and asking questions; Litster et al, 2020), experimenting, conducting measurements in the classroom or nature (Freeman et al, 2014), collecting data using models to reflect mathematical knowledge, presenting concepts with diagrams, models, drawings, estimation, independent source searching, finding similarities, differences, and connections between concepts and facts.…”