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    Learning Together With Sally and Kate

    Price range: $3.99 through $13.99
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    Magic Square: Its New Discoveries and Applications

    Magic Square is no longer magic, but the era of magic square puzzle has just begun. This outstanding application at Magic Square will be played by millions throughout the world, I appeal to educators to adopt magic square puzzles to school’s curriculum. If you are interested, e-mail me at dwkmei815@gmail.com.

    Price range: $3.99 through $8.99
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    Untaught Math

    This book is not meant to be a textbook or to replace any textbook that demonstrates problem solving for algebra, geometry, trigonometry, or calculus. The purpose of this book is to enrich the minds of high school students studying math by presenting subjects that are not usually taught in high school

    math courses, but which are interesting and enjoyable for the curious minded high school students and their teachers.

    Price range: $3.99 through $12.99