Improvement of all-Russian testing works of mathematics in primary school based on the experience of the national testing in Great Britain

The article deals with the analysis of the all-Russian testing works of mathematics in primary school. There is given the comparative characteristics of the organizational forms and contents of the all-Russian testing works of mathematics in the 4th grade of the Russian primary school and the different kinds of the test tasks of mathematics (Test A, Test B, Mental Arithmetic Test) for the second key stage of primary school in Great Britain. The experience can be used for the improvement of the all-Russian testing of mathematics in the primary school of Russia.