Realization of intersubject communications in the elective course of mathematics

In the article we presented the results of realization intersubject communications in the elective course of mathematics (the topic "Derivative"). Within the framework of the current Federal State Standard there is a necessity of such programs and textbooks on mathematics, which would effectively differentiate mastering the material by students on the compulsory and in-depth levels, and develop the competencies with an applied focus. It is possible due to implementation of intersubject communications in the training courses. Strengthening of interdisciplinary connections should be considered as one of the most important ways for didactic improvement of school mathematics; their inclusion in the training process helps to systematize and deepen students' knowledge, to develop skills of independent cognitive activity, to transfer the knowledge gained at lower levels of education to higher levels. To implement intersubject communications we should comply with the following conditions: understanding of the concept “derivative” as a limit to difference ratio; integration “derivative” mechanical meaning at physics lessons; study of the applied character of differential calculus and limit analysis methods at economics lessons.