Who wrote the first kindergarten manual and also wrote the Happy Birthday song?

Question

Quizplus · Accepted Answer

Patty Hill Smith, along with her sister Mildred J. Hill, is credited with composing the melody for the song "Good Morning to All," which later evolved into the lyrics for "Happy Birthday to You." Patty Hill was also a pioneer in early childhood education and played a significant role in the development of kindergarten programs in the United States.

Who Wrote the First Kindergarten Manual and Also Wrote the Happy