The path of the 1st grade pupils taught by the Hejný´s method to the comprehension of addition and subtraction

This thesis is focused on understanding of addition and subtraction by pupils during maths lessons by Hejný. The aim of the thesis was fulfilled using analysis of pupil's solutions of some chosen exercises from publisher's Fraus textbooks. For the information survey, a combination of action and qualitative research methods. The research was carried out in the school year 2017/2018 at the primary school in the Prague - east district