Massachusetts Gov. Charlie Baker on Tuesday activated up to 200 members of the National Guard to help with COVID-19 testing in the state’s K-12 schools. Guard members will start training for school-based COVID-19 testing this week, according to the Republican governor’s office. They will then begin conducting COVID-19 tests in a select number of Massachusetts schools on Oct. 18. In another order issued the same day, the governor activated up to 250 National Guard personnel “as a contingency measure” to offset potential staffing shortages at the Department of Correction (DOC). “We are grateful that the National Guard has stepped up once again, as they have throughout the COVID-19 response, to serve the Commonwealth where needed,” Baker said in a statement announcing the orders. “Today’s activations will ensure that we have additional staffing support for our school testing programs to help kids stay safe and will allow DOC to respond to …