Mathematics learning that can solve questions and questions 24 hours a day, anywhere. Buy a free SAT Mathematics Series!1. 로 immediately through the publisher website and apps Baro Mathematics series (type / SAT) 구매 buy and register the book after watching the video for free.2. Every issue contains a kind and detailed lecture by Mr. Hwang Min-ha, Department of Mathematics Education, Seoul National University.3. Watch the video-When you log in You can search and view the video commentary of unknown questions about the book you purchased.4. App push function for video watching record when logging out for the school-When a member who purchases a book after signing up to watch a video, the video code number is pushed to the school management teacher.
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