Charter school debate exposes tensions within teachers union

STATE HOUSE — Leadership of the Massachusetts Teachers Association has vowed to fight a ballot initiative to expand charter schools with everything it has, but the issue has exposed strife within the union heading into new leadership elections in May.
The MTA Board of Directors over the weekend backed away from a plan put forward by President Barbara Madeloni to commit $9.6 million in union resources to the "Keep the Cap" campaign to fight charter expansion.