First yard.
Basic shapes and construction

01 Straight lines, half-lines, line segments
02 Finding the size of an angle
03 Vertical angles, vertical lines and perpendicular lines
04 Positional Relationships of Points, Lines, and Planes 1
05 Positional Relationships of Points, Lines, and Planes 2
06 Parallel lines
07 Construction
08 Construction of triangles
09 Congruence of triangles

Second yard.
Plane figure

10 Polygons and Diagonals
11 triangles
12 Interior and exterior angles of polygons
13 Circles and sectors
14 The size and area of ​​the central angle of a sector, and the length and area of ​​the circumference of a circle
15 Length and area of ​​the arc of a sector
16 Length and width of the perimeter of the colored area

Third yard.
three-dimensional figures

17 polyhedrons
18 regular polyhedrons
19 Rotor
20 volumes
21 Surface area
22 Surface area and volume of various solid figures

Fourth yard.
statistics

23 Representative value
24 Stem and Leaf Diagrams and Frequency Tables
25 Histogram, Frequency Distribution Polygon
26 Relative frequency
27 Graph showing the distribution of relative frequencies

Quick Middle School Patterns for Busy Middle School Students

Middle school 1st grade math is the foundation of middle and high school math!
How should I study to do well in middle school math?

Build a solid foundation in middle school math and move on!

Mathematics is a subject with a strong systematic structure, with units connected from middle school mathematics to high school mathematics.
The second semester middle school mathematics course is mostly focused on shapes (geometry) for all 1st, 2nd, and 3rd grades, and the content is linked to 1st through 3rd grade middle school.
In particular, the basic shapes and construction, plane figures, and solid figures of the first year of middle school are important units that form the basis of the geometry area of ​​middle school mathematics.
This book is faithful to the most basic issues that middle school students need to know.

So, what should I do first to study middle school math efficiently?
(1) It is better to solve easy problems one by one.
(2) It is better to encounter many difficult problems.

Study experts say this:
“If it is difficult to learn, it helps you remember it for a long time.
However, if the learner does not have background knowledge, the difficulty becomes undesirable.” If the math problem is too difficult without background knowledge, the brain cannot overcome fatigue and gives up on studying.
So, if you are a student who is good at math, (2) is the correct answer, but if you are an average student, (1) is the correct answer.

Let's build the foundation of middle school math, starting with easy problems!

Even students who enjoyed elementary school geometry often find middle school geometry difficult.
This is because, unlike elementary school geometry, middle school geometry often features many abstract terms and unfamiliar formulas.
Moreover, most second semester middle school math workbooks are designed to teach students to solve advanced problems before they become familiar with the concept of shapes.
There's no study method more inefficient than solving advanced problems without even understanding the content.
However, many students fall victim to difficult math workbooks.
'Busy Middle School Geometry' is a book that allows you to solve easy problems step by step using the basic concepts and formulas of middle school geometry. It is a unique book among the books currently on the market that is designed to be solved on your own without a teacher.

Busy tips from a famous instructor in Daechi-dong! It feels like the teacher is right next to you.

Existing books simply collect vast amounts of knowledge into one volume, but do not teach how to study it.
So, I often relied on my teacher.
However, this book contains detailed study tips as if the teacher were teaching you face-to-face.
Each concept is explained in detail at each stage, and the "Busy Tips" from Daechi-dong's renowned instructors are included, making it easy to understand even when studying on your own.
Additionally, the author provides video lectures on concepts at every step of the book, allowing you to hear explanations of the concepts directly.

Only the basic problems for the second semester of the first year are collected in one book.

This book covers not only geometry, but also all the math content learned in the second semester of the first grade.
This book covers basic math problems from the second semester of the first year, including not only geometry but also statistics, so you can build a solid foundation.
If you train with this book and build a solid foundation, you'll gain the strength to tackle any type of advanced problem that comes your way.

70% of middle school students get this problem wrong, solved with the "Oops! Mistake" and "Go! X-Man and ○-Man" corners!

Even friends who are good at math often get their scores lowered by mistakes.
This book has a special device to prevent you from accidentally getting a score lower than your actual ability.
We've compiled the points of error that 70% of middle school students frequently make in the "Oops! Mistake" section on the concept page.
Additionally, the 'Go! ×Man and ○Man' corner allows you to see at a glance which calculations are correct and which are incorrect, which helps to drastically reduce mistakes.
Additionally, at the end of each stage, we've included 'free exam questions', suggesting middle school exam questions that can be solved just by practicing in this book.
There are many school exam questions that can be answered correctly just by solving all the problems in this book.
If you're a middle school student, it's time to organize your concepts and learn problem-solving techniques! "Busy Middle School Student" will help you.
Build a solid foundation in middle school math with this book!

How to effectively view the "Busy Middle School Math and Geometry" series

The 'Busy Middle School Math and Geometry' series consists of two volumes of 'Busy Middle School Math' for the first semester and one volume of 'Busy Middle School Geometry' for the second semester.

1.
Want to strengthen only your weak areas? - Choose only one of the three books! If you find prime factorization, integers, and rational numbers difficult in the first year of middle school, choose and organize Middle School Arithmetic Volume 1, "Prime Factorization, Integers, and Rational Numbers." If you find linear equations, graphs, and proportions difficult, choose Middle School Arithmetic Volume 2, "Linear Equations, Graphs, and Proportional Areas." If you find shapes difficult, choose and organize Middle School Geometry, "Basic Shapes and Construction, Plane Figures, Three-Dimensional Figures, Statistics."
Even if you are a middle school student, whether you are a first-year or second-year student, focus on studying your weak areas to quickly make up for your learning deficits.

2.
What if I am a first-year middle school student but weak in math, or a prospective first-year middle school student preparing for middle school math?
Study in the following order: [Middle School Math Volume 1 → Middle School Math Volume 2 → Middle School Geometry] according to the progress of middle school math.
You can solve basic problems, so you can build a solid foundation for middle school mathematics.

3.
What if you are a teacher at a school or a study room?
1) For students who lack basic knowledge, briefly explain the concepts and then use it as a self-study material.
2) For students who have mastered the concept, use it as a textbook for homework.
3) It is suitable as a short-term textbook for vacation to supplement light pre-learning and learning deficits.

*Busy Middle School 1st Grade Operations Volume 1 consists of 28 steps, Volume 2 consists of 25 steps, and Shapes consists of 27 steps, and each step can be solved within 1 hour.