★ A Bestselling Educational IP with Over 20 Years of Enduring Success!
First published in 2002, this series has been a consistent bestseller in the Chinese market for over two decades, with global cumulative sales exceeding 10 million copies. It has weathered multiple economic and educational policy cycles, remaining a perennial "evergreen" atop educational supplement bestseller lists. Its official recognition as a "National Bestseller of Excellence" further certifies its significant market influence.

★ What is the Core Competency Most Essential for Building a Child's Learning Foundation?
When your child learns to solve one problem, they acquire a method. When your child masters the ability to "Learn One and Apply to Three", they gain structured thinking, the transferable skill of drawing inferences, and resilience in tackling complex problems. This series does more than teach mathematical techniques; it systematically trains a child's "thinking muscles" through its meticulously designed "one model problem, three practice exercises" progressive framework. This aligns perfectly with the internationally emphasized educational concepts of "Problem-Solving Skills" and "Growth Mindset".

The series currently comprises 12 volumes:
Version A: Grade 1, Grade 2, Grade 3, Grade 4, Grade 5, Grade 6
Version B: Grade 1, Grade 2, Grade 3, Grade 4, Grade 5, Grade 6

This is a comprehensive and uniquely methodological system designed for training primary school students' mathematical thinking. It primarily targets pupils (typically Grades 1-6) who wish to expand their mathematical thinking and cultivate an interest in problem-solving.

Core Structure & Philosophy:
The series' most renowned feature is its deep-learning model of "One Model Problem, Three Practice Exercises; Learn One and Apply to Three." Each knowledge unit revolves around a classic "Model Problem," accompanied by detailed thought-navigation. This is followed by three carefully structured "Practice Exercises": the first reinforces the method through imitation; the second alters conditions to guide skill transfer; the third offers integrated expansion for innovative challenge. This design compels active mental processing and pattern recognition, moving beyond passive imitation, which is key to internalizing abilities.

Product Formats & Evolution:
The series is primarily divided into Version A and Version B. Version A focuses on "Daily Learning," offering one model problem with three exercises per day for steady, accumulative understanding. Version B emphasizes "Weekly Practice," providing comprehensive test papers for periodic consolidation and skill assessment. Used together, they form a complete loop of instruction, practice, and evaluation.

Problems It Solves:
It aims to bridge the gap between standard school mathematics curriculum and the cultivation of higher-order mathematical thinking. By engaging with refined, thought-provoking problems, students can move beyond mechanical calculation, appreciate the beauty of mathematical logic, and hone core cognitive abilities such as analysis, reasoning, induction, and reverse thinking.

The R&D Team

This is a dedicated collective comprised of senior education experts, teaching researchers, and frontline teachers with extensive experience in competition coaching. They possess a deep understanding of the cognitive development patterns of primary school children and have accurately pinpointed the intersection between China's basic education curriculum standards and advanced skill development. The team's core work goes beyond mere compilation of exercises; it involves "educational design." Everything from the overall curriculum planning and gradient setting of teaching progressions to the strategic arrangement of each model problem and practice exercise undergoes repeated scrutiny to ensure the efficacy of its methodology (the "modular" teaching model). This approach of driving product innovation through professional pedagogical research guarantees the content's foresight and practicality.

Week 1: Defining New Operations
Week 2: Clever Ways to Calculate Fractions (Part 1)
Week 3: Clever Ways to Calculate Fractions (Part 2)
Week 4: Clever Ways to Calculate Fractions (Part 3)
Week 5: Converting to the Unit “1” (Part 1)
Week 6: Converting to the Unit “1” (Part 2)
Week 7: Converting to the Unit “1” (Part 3)
Week 8: Problems Involving Distance and Time (Part 1)
Week 9: Problems Involving Distance and Time (Part 2)
Week 10: Applications of Ratios
Week 11: Solving Problems Using the Assumption Method
Week 12: Solving Problems Using the Backward Reasoning Method
Week 13: Solving Problems Using Algebraic Methods
Week 14: Identifying “Invariants”
Week 15: Plane Geometry of Straight Lines
Week 16: Circles and Sectors (Part 1)
Week 17: Circles and Sectors (Part 2)
Week 18: The Pigeonhole Principle
Week 19: Economic Problems (Part 1)
Week 20: Economic Problems (Part 2)
Week 21: Cylinders and Cones (Part 1)
Week 22: Cylinders and Cones (Part 2)
Week 23: Comprehensive Solid Geometry
Week 24: The Movement of Figures
Week 25: Applications of Proportions
Week 26: Problems Involving Distance and Time (Part 3)
Week 27: Problems Involving Distance and Time (Part 4)
Week 28: Problems Related to Concentration
Week 29: Engineering Problems (Part 1)
Week 30: Engineering Problems (Part 2)
Week 31: Graphs Related to Distance and Time
Week 32: The “Cows Eating Grass” Problem
Week 33: Problems Involving Counting
Week 34: Problems Related to Maximum and Minimum Values
Week 35: Logical Reasoning
Week 36: Comprehensive Number Theory
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