Development of skills to work with digital sound in the school informatics course

The development of digital competencies of students is currently one of the main pedagogical tasks. The solution of this task is possible by paying attention to issues related to the skills of students to create their own digital content, for example, multimedia, combining various types of information (text, graphics, video and audio). The article provides a brief analysis of the content of teaching issues related to the study of digital sound processing technologies in a school informatics course. Taking into account the relevance of this issue, a thematic module "Digital Sound" is proposed, the content of which does not require binding to specific software. When studying the module, the emphasis is on mastering specific technologies for processing sound information. The module can be implemented as an optional course for students in 7–9th grades and/or as an elective course for students in 10–11th grades. At the same time, particular blocks of the module can be used at various stages of teaching informatics at school

Algorithm for rational determination of the area of a triangle for the development of students' creative thinking and practical application. Properties of the 90 Degrees angle tangent

The article presents the formulas derived by the author for determining the area of a triangle by a side and two adjacent angles. These for - mulas are used to activate the educational process — students in practice figure out how to rationally determine the area of land plots, buildings, draw up and solve trigonometric equations, prove the properties of the tangent of an angle equal to 90 degrees, correct the graph of the function y = tg x. To carry out calculations of the areas of triangles, to prove the properties of 90 degree angle tangent, to solve trigonometric equations, programs are written in the Visual Basic For Application language in Microsoft Word. Using the binary-decimal system and VBA programs in Word, the value of the tangent of an angle is calculated so close to an angle of 90 degrees that this value can be roughly taken as the 90 degrees angle tangent. The study of this material at informatics lessons contributes to the development of creative thinking of students, increasing their motivation to study informatics and information technology.

The summary lesson on the theme "number systems" in the web quest format

The theme "Number systems" is one of the basic in the school informatics course. The material of this theme is present in the tasks of the Main State Examination and the Unified State Examination, therefore it is very important to timely and efficiently consolidate the basic algorithms to convert numbers from one number system to another. The article provides a variant of such a summary lesson on the theme "Number systems" for the 8th grade in the format of web quest. The quest was developed in the Thinglink environment and contains several locations, each of which is associated with the convertion of numbers between different number systems. The tools for solving the quest tasks are Google Sheets and the LearningApps service, in which the author of the article has developed his own educational resources, as well as the Geogebra environment for performing constructions in one of the tasks. The presented quest can also be carried out in a computer-less form

Methodology for solving the task no. 8 of the unified state exam in informatics and ICT by a combinatory method and method of programming on python

The article discusses the metodology for solving the task No. 8 of the Unified State Exam in informatics and ICT in two ways: by mathematical combinatorial calculation and writing a program in the Python programming language. The purpose of this methodology is the successful completion of task No. 8 (until 2021 — No. 10) in the Unified State Exam in informatics and ICT by graduates. The article is of an interdisciplinary nature, touches upon issues at the intersection of mathematics and informatics. The relevance of the work is due to the fact that tasks of this type are annually present in the Unified State Exam in informatics and ICT, but the success of this task is too low for tasks of the basic level of complexity. The use of programming tools in the Unified State Exam in informatics and ICT is available starting in 2021. The scientific novelty of the work lies in the use of the Python programming language to solve tasks of this type. The peculiarity of the metodology lies in the gradual increase in the complexity of the algorithms and the "modular" application of parts of the code, which allows using the "modules" of previous tasks to solve subsequent ones. Specific versions of the programs are proposed, a comparative analysis of methods for various prototypes of the corresponding tasks is given. As a result, it was determined that task No. 8 can be effectively solved by the programming method.

Exploring the operation of a neural network using the example of handwritten digits recognition in an advanced informatics course using the python 3.8 programming language

The article discusses the possibility of including artificial intelligence topics in the informatics course at the level of secondary general education on the demonstration example of handwritten digits recognition using the Python 3.8 programming language and the TensorFlow package. A hands-on example of a classification problem using the classic MNIST (Modified National Institute of Standards and Technology) training example set is dealt with step-by-step.Most of the tools required for the work (language interpreter, basic libraries, and shell) are downloaded in the form of a single software distribution kit of Anaconda. The network is trained using different methods. When the model is trained, the optimization method, the loss function, and the metric for estimation are specified. Image processing by convolutional nets containing special layers, which "convolve" the image the way a bitmap filter does, is also demonstrated

Organization of distance competitions in video conference form with parallel demonstration of results

The article presents the experience of conducting online contests as part of extracurricular activities. This experience can be useful in organizing distance competitions under the constraints of a pandemic, with remote locations of schools, as well as for involving children with disabilities in competitions. During the competition, for the objectivity of its results, the participants are given the opportunity to evaluate and self-evaluate. The article describes in detail the technology of preparing materials for the competition, which will allow everyone to independently develop their own version of the competition. To summarize the results of the competition, a method is presented to consolidate data from several Google forms in one document.The material will be useful for teachers, methodologists, heads of educational institutions of all types, students of higher and secondary pedagogical educational institutions.

Use of technoloy of development of critical thinking in informatics lessons at school

The article summarizes the pedagogical experience of applying the techniques of technology for the development of critical thinking in informatics lessons at school. The purpose, structure, the tasks of the technology for the development of critical thinking are determined, the algorithm of its application in teaching is described. The features of the implementation of each phase of the technology for the development of critical thinking are described: challenge, comprehension, reflection. An example of the classification of methods for the development of critical thinking in students in accordance with the structural components of thinking is given. On the example of specific themes of the school course of informatics ("Information", "Social Informatics", "Algorithmization and Programming", etc.), the possibilities of using the technology of developing critical thinking to activate and develop the thinking abilities of students are shown. The use of the technology of critical thinking in informatics lessons at school allows students to master the methods of information analysis, the basics of semantic reading, that is important for the successful assimilation of subject knowledge

Solving game problems using recursion

The article describes the methodology to game problems of Olympiads in informatics using recursive numbers generation. The study is based on the sequential solution of increasingly complex tasks. For each task, the following materials are given: the condition of the task, the idea of the solution with a proposal to come up with an independent implementation, the solution in the Pascal programming language. Distance learning system DL.GSU.BY is the effective technical base for teaching. It allows offer the student a condition of the task; send the solution for review; get a verdict from the system — a correct or incorrect solution; for incorrect solutions, the number of the test on which the solution did not pass is indicated. A student can take a test (input and output data), on which his solution did not pass, figure out what the error is in his program, correct and send the solution again. In addition, for each problem there is a link on it to the topic in the forum at site, where you can ask a question on solving this problem and / or read the answer if the questions have already been asked before.

Formation of the ability of junior schoolchildren to work with schemes

Children come across sketches and technical drawings even in preschool age in the process of performing constructive and visual activities; they begin to get acquainted with schemes and drawings only at primary school age. It is therefore no coincidence that one of the tasks of teaching in primary school is the formation of sign and symbolic activity among students, which provides specific ways of transforming educational material and performs the following functions: coding — transmission and reception of information; schematization — the use of symbolic means to display educational material; modeling — highlighting and displaying essential features of an object by operating with symbolic means. The article analyzes the possibilities of forming in junior schoolchildren the ability to work with schemes in the process of teaching construction using the Cuboro constructor. The main studied concepts, stages of training and their content, skills are considered. The possibility of using the Cuboro Draw program in working with younger students is shown. The Cuboro Draw interface and the process of creating schemes in this program are described.

Development of digital competencies of high school students In the school informatics course by means of case technologies

In the context of digitalization of education, the article actualizes the problem of finding new and developing existing methods and means of teaching. Currently, case technologies have received a new update, which can be effectively used for the purpose of propaedeutics and the development of digital competencies in high school students, including in the context of specialized training. The article describes both the essence and features of this method as applied to the educational process of a modern school, and the experience of using specific cases of a controlling nature when students study information technologies as part of a school informatics course. From a methodological point of view, the presented material will be useful not only for school teachers, but also for university teachers involved in the professional training of future teachers of informatics.