Complex sentence: He served as president of the Handel and Haydn Society, taught music in the public schools, was co-founder of the Boston Academy of Music (1833), and in 1838 was appointed music superintendent for the Boston school system.
Split into simpler sentences: He served as president of the Handel and Haydn Society, taught music in the public schools, was co-founder of the Boston Academy of Music (1833). In 1838 he was appointed music superintendent for the Boston school system.