@article{Kovalchuk2017techniques,
author={Kovalchuk, E.V.},
title={TECHNIQUES OF SYSTEM-ACTIVITY APPROACH IN SECONDARY SCHOOL},
journal={Scientific and methodological journal "Science and education: modern time"},
publisher={Non-state educational private institution of additional professional education "Expert-methodological centre"},
year={2017},
pages={34-36},
volume={1},
issue={2},
}