Tapia Enríquez Carmen Rosa2023-11-152023-11-152023-11-15https://repositorio.ispa.edu.pe/handle/123456789/311The objective of this research was to compare the level of development of critical thinking in 3rd and 4th grade students of the Primary level of Institution No. 40135 "Teniente Ferre", in the district of Mariano Melgar; the methodology used was the quantitative approach of non-experimental design of comparative descriptive type, the technique used was the objective test, as an instrument validated through 3 experts, the sample consisted of 50 students from the 3rd and 4th grade of the Primary level between the 8, 9 and 10 years old; the results achieved indicated that; 67% of the students are at a process level to develop critical thinking, this level being favorable, having high levels in terms of the reasoning dimension, while in the decision-making dimension the majority was located at the of process, finding starting levels in terms of the problem solving dimension where it was the aspect that most required pedagogical intervention. In conclusion, the level at which students are in the development of critical thinking is a process level. Keywords: Critical Thinking, Reasoning, Decision Making and Problem Solving