Understanding the physical meaning of the derivative is not at all as difficult as it might seem to the uninitiated. In fact, any motorist copes with a similar task every day when he looks at the speedometer, determining the speed of his car
Education has always had a special meaning for Russians. Literacy in the country has always been at a high level. Education in the Soviet school, although it was standard, was very high in quality. Secondary education in Russia is changing. Where it leads?














