When the teachers union over the weekend announced the “exciting news” that San Francisco’s high school seniors will get a chance to go back to classrooms starting Friday, they left out details about the plan, including that students might only be back for just one day. In addition, the class of 2021 won’t get any in-person instruction while they’re at one of two school sites. Instead, they have “in-person supervision.” In what some are calling a blatant money grab, the deal between the district and teachers union will bring seniors back “for at least one day before the end of the school year,” so the city’s public schools can qualify for $12 million in state reopening funds.