  The paper deals with pedagogical heritage of A.V. Usova (1921-2014) that
yields insights into problems of interdisciplinary relationship in the school
science education system. Her fundamental works were used as teaching guides in
the preparation of physics teachers of all pedagogical universities of the
Soviet Union and Russia. In this study, professor Usova is not an
interdisciplinary researcher; she is a researcher of interdisciplinarity. Here
is provided a short and consistent description of her views on teaching physics
as a foundation of educational interdisciplinarity. Usova elaborated
educational functions, classifications, organizational levels, ways of
instantiating, content-related foundations of interdisciplinary relations,
recommendations for practical applying interdisciplinary relations. Besides,
Usova suggested a unified approach to the study of knowledge and skills through
the generalized plans. And we would like not simply clarify, retell or restate
the very powerful didactic discoveries of Usova, but consider opportunities of
teaching across boundaries for actual educational challenges. The future of the
field of didactics, which deals with the study of interdisciplinarity, is very
interesting and attractive. This problem will always excite scientists,
educators and teachers, and the futurity of science education depends on the
ways it is solved.
