BOSTON (AP) — An Associated Press investigation has found that more than $500 million in K-12 pandemic aid allocated by Congress went to privately operated schools that were entirely virtual even before the COVID-19 outbreak. Officials at virtual schools say the funding was needed to serve a wave of students who transferred from traditional schools during the pandemic. But leaders of some other schools wonder why any money went to virtual charters that didn’t have to pivot to online learning and don’t have to worry about measures such as social distancing or sanitizing.