The present article aimed to investigate the effect of speed-strength classes on the concentration indicators of thirteen- to fourteen-year-old students with diverse typologies. The study period was three months. All physical education classes were held for 40 minutes and twice a week. Students from the control class (20 children) studied based on the common program, and students from the special group (20 children) further carried out a set of speed and strength exercises. All students performed the tapping test (strength of the nervous system) and the Bourdon test (concentration of attention). After a special study, the concentration values in the control class in kids with a strong nervous system improved by 5% (p>0.05) and with a weak one - by 6% (p> 0.05). In the experimental class, concentration indicators increased by 13% (p<0.05) in schoolchildren with a strong nervous system and with a weak one - by 16% (p<0.05). It is necessary to perform a group of physical exercises that affect the development of strength and speed abilities in physical education classes at school. Physical activity for students aged 13-14 years should be differentiated considering the strength of the nervous system. As a result, the indicators of strength and speed qualities will improve and the indicators of students’ concentration.