Description ▶1-1 1. Numbers up to 9 2. Various Shapes 3. Addition and Subtraction 4. Comparing 5. Numbers up to 50 〈Main Content〉 ✐ Unit Introduction: Each unit opens with an engaging overview of its historical background, meaning, context, or real-life examples, helping learners build the broad background knowledge needed for advanced-level understanding. ✐ Basic Concept: Goes beyond textbook-level concepts to include practical concepts, connected concepts, cautionary points, and critical-thinking concepts—laying the groundwork for in-depth study. ✐ Basic Test: Before diving into advanced practice, this stage lets students apply core concepts and check their understanding. ✐ Math Topic: Students work through carefully selected representative advanced problem types to strengthen problem-solving skills and critical thinking. ✐ Level Up Test: By solving a variety of advanced problems beyond the representative types, students learn different strategies and approaches, taking another step toward top-level performance. ✐ High Level: Challenging problems modeled after those found in outside math competitions help students aim for the top 3%. 〈Special Supplement〉 Unit-by-unit school competition-style problems Tests designed to build the kind of critical thinking skills needed for future exams