Unit 1. The Sound of the Letter Aa
      Unit 2. The Sound of the Letter Bb
      Unit 3. The Sound of the Letter Cc
      Unit 4. The Sound of the Letter Dd
      Review 1. From Aa ~ Dd
      Unit 5. The Sound of the Letter Ee
      Unit 6. The Sound of the Letter Ff
      Unit 7. The Sound of the Letter Gg
      Review 2. From Aa ~ Gg
      Unit 8. The Sound of the Letter Hh
      Unit 9. The Sound of the Letter Ii
      Unit 10. The Sound of the Letter Jj
      Review 3. From Aa ~ Jj
      Unit 11. The Sound of the Letter Kk
      Unit 12. The Sound of the Letter Ll
      Unit 13. The Sound of the Letter Mm
      Review 4. From Aa ~ Mm