Review first 15 katakana
Set #1: Listen & write words using ア to コ
Set #2: Listen & write words using ア to ソ
Set #3: Listen & write words using ア to ト (accents, long vowels, small TSU)
Set #4: Listen & write words using ア to ノ
Set #5: Listen & write words using ア to ホ
Set #6: Listen & write words using ア to モ
Set #7: Listen & write words using ア to リ
(focusing on YA, YU, YO, RA, RI)
Set #8: Listen & write words using ア to ン (but focusing on RU, RE, RO, WA, N)
Set #9: Don't confuse these shapes: シ and ン and ツ and ソ