1. Build Your English Study Habit-6 pages a day, 5 days a week, 4 weeks2. Develop basic English skills-Strengthen textbook vocabulary by step by step with alphabets, phonics, words, and sentences3. Have fun studying-Fun play and learning through chant, cartoon, and creative game activities■ Main composition• QR Scanner-Sound source automatically plays without clicking a link address, convenient and fast listening!• Sound source learning-Level → week → day → click the corner name, find and listen to the desired sound source right away!• Chant Learning-Collect all the exciting chants and play them repeatedly![Textbook introduction]1. Level: Level 1~ Level 4 (each level consists of A and B volumes) total of 8 books 1) Level 1 A (alphabet + phonics), Level 1 B (word + write) 2) Level 2 A (Phonics + Word), Level 2 B (Word + Writing) 3) Level 3 A (Phonics + Word), Level 3 B (Word + Writing) 4) Level 4 A (word + write), Level 4 B (word + write)2. Smart Day VOCA Supplementary Materials 1) Book appendix: Vocabulary list and word card provided 2) Online materials: Provides a variety of additional activities besides the word test (Free download from book.chunjae.co.kr/)※ Available for Android version 4.4 or higher.