Abstract: This article thoroughly examines such aspects of the topic as determination of new trends and approaches towards ensuring systematicity and comprehensiveness of functionality of the national system of education quality assessment; effective managerial decision-making via development and implementation of the local normative acts under the authority of educational institution with regards to education quality control. In the conditions of establishment of the unified system of education quality assessment in the Russian education and limitations of resources (organizational, personnel, methodological, normative, motivational, etc.), the heads of educational institution are aware of the need and importance of improvement of the national system of education quality assessment . This article examines the key stages in improvement of the national system of education quality assessment in the context of implementation of curriculum of public secondary education integrated with the curriculum of professional training on the disciplines “Horticulturist”. The novelty of this research consists in the fact that systematic gathering and analysis of information on the content, students’ performance, and conditions for implementation of the curriculum of public secondary education integrated with the curriculum of professional training on the profession “Horticulturist”, with subsequent determination of the problems, contributed to the making effective management decisions aimed at elimination of the “problem areas”. The expected result of improvement of the model of national system of education quality assessment consists in quality improvement of the public general education. The authors’ special contribution into the research of this topic lies in obtainment of practical results in the course of implementation of the improved model of the national system of education quality assessment on the level of administration, bodies of state administration, pedagogical personnel of the educational institution.