Investigators say the group raised more than $15 million from individuals and then contributed it to the Great Schools Massachusetts Ballot Question Committee in a manner intended to disguise the true source of the money.
"Just be patient today," Boston Mayor Marty Walsh said about the first day of school. "We're excited about the school year. We've seen real major improvements over the last several years in the city of Boston."
Boston Public Schools Superintendent Tommy Chang said on the first day back to school that Boston students are "rich in diversity" and school officials are working to make all feel welcome.