This book can be used by students who are preparing for math competitions such as Mathcounts, American Mathematics Competition 10/12, and ARML (American Regions Mathematics League) Competition.

This book can be used by 6th to 10th grade students preparing for AMC 10. Each chapter consists of (1) basic skill and knowledge section with examples, (2) plenty of exercise problems, and (3) detailed solutions to all problems.
Training class is offered: http: //www.mymathcounts.com/Copied-2015-Summer-AMC-10-Training-Program.php

Lectures preparing for American Invitational Mathematics Examination (AIME) with plenty of practice problems and solutions.

Lectures preparing for American Invitational Mathematics Examination (AIME) with plenty of problems with detailed solutions.
In the book, each chapter has three parts: (1) knowledge part talking about theorems, formulas, and skills with examples, (2) problems, (3) solutions to the problems.
Topics include:
Solid Geometry - Cube and Prism
Plane Geometry Similar Triangles
Algebraic Manipulations
Solving Equations
Cauchy Inequalities

Lectures preparing for American Invitational Mathematics Examination (AIME) with plenty of practice problems and solutions.

This book can be used by 6th to 8th grade students preparing for Mathcounts State and National Competitions.
This book contains a collection of five sets of practice tests for MATHCOUNTS National competitions, including Sprint and Target rounds. One or more detailed solutions are included for every problem.
For 1990-2000 Mathcounts National Team Round solutions: https: //www.amazon.com/dp/1543272304
2000-2010 Mathcounts National Team Round solutions: https: //www.amazon.com/dp/1544764421

This is the second book of the Math Contest Books Series -- This book introduces the new methods to solve balls and boxes distribution problems. The book can be used by students preparing for math competitions such as Mathcounts, and AMC 8/10/12.
Each chapter consists of (1) basic skill and knowledge section with examples, (2) exercise problems, and (3) detailed solutions to all problems.
First book of Math Contest Books Series. The Mass Points Method:
https: //www.amazon.com/Mass-Points-Method-Yongcheng-Chen/dp/1523265884
Third book of Math Contest Books Series: The Area...

This is the first book of Math Contest Books Series. The book introduces a powerful problem solving technique - the mass points method. The book can be used by students preparing for math competitions such as Mathcounts, AMC 10/12/AIME.
Second book of Math Contest Books Series:
https: //www.amazon.com/Balls-Boxes-Yongcheng-Chen/dp/1540390578
Third book of Math Contest Books Series: The Area Method
https: //www.amazon.com/dp/1540856410
Fourth book of Math Contest Books Series: Problem Solving Using Cauchy's Inequality
https: //www.amazon.com/dp/1541000285
Fifth...

This is the third book of Math Contest Books Series.
The book introduces the area method for solving geometry problems.
The book can be used by students preparing for math competitions such as Mathcounts, AMC 8/10/12, and AIME.
Each chapter consists of (1) basic skill and knowledge section with examples, (2) exercise problems, and (3) detailed solutions to all problems.
First book of Math Contest Books Series.
https: //www.amazon.com/Mass-Points-Method-Yongcheng-Chen/dp/1542458706
Second book of Math Contest Books Series:
https:...

This is the fourth book of Math Contest Books Series.
The book introduces the ways to use Cauchy's Inequalities to solve a variety of math contest problems.
The book can be used by students preparing for math competitions such as AMC 10/12, ARML, AIME, and USAMO.
Each chapter consists of (1) basic skill and knowledge section with examples, (2) exercise problems, and (3) detailed solutions to all problems.
First book of Math Contest Books Series. The Mass Points Method:
https: //www.amazon.com/Mass-Points-Method-Yongcheng-Chen/dp/1523265884