Primary school is the most important stage in the life of every child, the period when there is a change of leadership, the development of a new social role and the formation of functional literacy in all the leading areas of personal development. This level of education is traditionally a platform for various pedagogical experiments, testing of normative documents and guidelines. Not an exception was the period of standardization of Russian education, the start of which was testing, and then the introduction of the Federal state educational standard of primary education (fgos).