With the curricular reform and the introduction of compulsory elective classes in informatics from 1st to 4th grade in all schools of the Republic of Croatia, there is a growing need to create quality teaching aids. Croatian publisher's in textbooks offer different content for achieving educational outcomes, but not all content is of equal quality and appropriate for all students. The main role in the selection of content for the achievement of educational outcomes is played by the teacher who critically analyzes the contents of the textbook. The content of the textbook often does not fully correspond to the individual needs of the students. It follows from all the above that an important component of quality teaching and learning is the teacher's competence to select those contents, and if necessary, to change and create their own tasks and examples. The development of computational thinking and programming has multiple benefits, but it is an abstract process for students, so motivation and encouragement is very important, which is influenced by many factors - choosing content appropriate for the developmental stage of students, choosing examples from everyday life and the possibility of applying for appropriate programs, programming language. This diploma thesis theoretically explains computational thinking and programming, contains an overview of the implementation of the subject Informatics in the Republic of Croatia and the Curriculum of the subject Informatics for primary school and gymnasium, analysis of textbooks that achieve outcomes in the field of computational thinking and programming, offers proposals for educational outcomes and suggestions for connecting the content of computational thinking and programming with other subjects within the project teaching. The starting point in creating proposals for the achievement of educational outcomes were everyday problems that students encounter, the adequacy of tasks to the cognitive development of students, and the applicability of the program in other subjects.