★ 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: Counting How Many
Week 2: Comparing More and Less
Week 3: Which Number Comes Before/After Which Other Number
Week 4: Similarities and Differences
Week 5: Who Has the Best Eyesight?
Week 6: Counting Line Segments
Week 7: Routes That Do Not Repeat
Week 8: Observing and Thinking
Week 9: Simple Applications
Week 10: Counting the Number of Pieces
Week 11: Finding Patterns and Drawing Based on Them
Week 12: Monkeys Eating Peaches
Week 13: Cutting, Folding, and Piecing Together Shapes
Week 14: Cleverly Using Tangram Pieces
Week 15: Counting Shapes
Week 16: Filling in Numbers
Week 17: Guessing How Old He Is
Week 18: Finding Patterns and Filling in Numbers
Week 19: Simple Reasoning
Week 20: Matchstick Games (Part 1)
Week 21: Change and Stability
Week 22: Queuing Up for a Field Trip
Week 23: Moving More to Make Up for Less
Week 24: Odd and Even Numbers
Week 25: It’s Not That Simple
Week 26: Simple Judgments
Week 27: Riddles Based on Mathematical Expressions
Week 28: Clever and Fast Calculations (Part 1)
Week 29: Matchstick Games (Part 2)
Week 30: Rabbits Eating Carrots
Week 31: Cats and Mice
Week 32: "+", "-" and "()"
Week 33: Fun with Color Balls
Week 34: Ways to Pay for Things
Week 35: Reasonable Grouping
Week 36: Keeping the Balance on the Scale
Week 37: Clever and Fast Calculations (Part 2)
Week 38: Interesting Problems
Week 39: How Many Different Ways Are There to Walk?
Week 40: Chickens and Rabbits in the Same Cage
Answers