Usher sings a song about the entire English alphabet with the muppets.

This song teaches students how to pronounce the double "e" ("ee") sound and gives plenty of examples of words that contain the sound.

Sergeant Mark orders vowel letterhead "O" to state his long and short sounds. He also asks the letterhead to state his sound when used in the words, "not" and "note."

This song teaches students how to pronounce the double "o" ("oo") sound and gives plenty of examples of words that contain the sound.

Letterhead "I" is ordered by Sergeant Mark to state his long and short sounds. The letterhead uses both its sounds in the words, "rip" and "ripe." Also, the letterheads mention a rule of vowels: when there's an "e" at the end of a word, the vowel before it should be pronounced with its long sound.