Original sentence: In carrying out his work, Mann met with bitter opposition by some Boston schoolmasters who strongly disapproved of his pedagogical ideas, and by various religious sectarians, who contended against the exclusion of all sectarian instruction from the schools
Edited sentence: In carrying out his work, Mann met with bitter opposition by some Boston schoolmasters who strongly disapproved of his innovative pedagogical ideas, and by various religious sectarians, who contended against the exclusion of all sectarian instruction from the schools