After that she continued a study first at Faculty for Mathematics and Physics to become a master of educational mathematics and then at the Faculty of Arts, Department of Psychology to become a doctor of science with the doctoral thesis “The role of representation of the problem for developing the concept of number among pre-school children”. She studied mathematics and physics on faculty of education and became a two-subject teacher for Primary school (grade 6 to 9). She works at the Department of Primary School Teaching.

Vida Manfreda Kolar is an associate professor for didactics of mathematics at Faculty of Education, University of Ljubljana.