The goal of knowledge quality improving of secondary school students in the field of exact sciences determines the relevance of creating interactive electronic educational resources for tasks solving of mathematical models programming. The paper presents the electronic textbook description, its content and structure, model, as well as design and software development technology. It is intended to improve qualitatively the preparation of high school students and junior university students in mathematics and programming. In particular, it can be used as a textbook at elective classes and young programmers clubs, as well as in the process of individual work to train schoolchildren and students for programming Olympiads. The content of the electronic textbook is based on a set of mathematical tasks. Each task contains a statement of the task, instructions for its solution and an algorithm for solving it, implemented in the form of program code in Pascal, C / C + and Python. The model of learning system using an electronic training manual is described. The e-tutorial software is a Web application and is built on client-server architecture. The basis of the Web-application is the "Textbook" software module, which contains a complex of mathematical tasks with the author's algorithms of solving. The web application contains a software module for expanding the electronic textbook content in the form of a built-in editor for mathematical tasks. A qualified user of the system has the opportunity to develop new tasks within the existing textbook format with a description of the algorithm for their solution. The automatic system of checking the proposed algorithm for task solving provides the basis for an expert opinion on placing a new task in the library for further use. The approbation of the Web-application in the educational process was carried out in secondary educational institutions of Kherson, and it received a positive assessment from students and teachers.