The present invention relates to a learning textbook composed of a multi-level learning process. The composition of the learning textbook (learning principle element) is presented in detail to understand what to memorize and understand in the lesson. 1) and; Learner can remind the memorized learning element once again by proactively checking how the learning element (conceptual principle element) learned in the first-level learning element memorization understanding textbook (2) is applied to the problem. A two-step identification learning problem solving textbook (2), which the teacher first explains and allows the learner to directly solve similar problems; After presenting the representative type problems that can come out of the unit through the first and second learning materials (1, 2), the teacher explains the intention of the representative type problem and all the learners to learn from the problem. A three-stage essential type problem learning material (3) configured to learn even a variety of learning matters; A four-step Principles of Applied Principles (4) to help students develop problem-solving skills for the parts of the practical problems prior to solving the practical problems; Lastly, to solve the various practical problems and to relearn whether the learning elements were wrong because they did not understand what learning elements were wrong or because they did not understand the partial problems. And a five-step practical problem solving textbook (5) capable of easily refitting the wrong problem by connecting the four-step application principle practice textbook (4).;Therefore, the present invention allows the learner to proactively identify the learning elements through the textbooks to memorize and understand the concepts and principles in each unit, and how the learning elements (conceptual principles) are applied to the problem and solved. Textbooks, textbooks to help you solve typical essential types of problems so that you can easily interpret and access any type of problem in the unit, and apply principles to develop problem-solving skills for parts that are applied prior to practical problems. Lastly, we have a textbook and a textbook that can proceed sequentially to solve practical problems so that learners can learn effectively and teachers can effectively check and learn about them. You can maximize your learning efficiency.
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