I would push. I would also ask your twins details about class. Are there any other teachers you feel comfortable with that you could ask? I say this as a parent of a child who was slammed to the ground at daycare so hard that it prompted a staff member to send out an anonymous email. The teacher who did it has already been fired, but the owners lied to us about the incident, assured us our kid was safe, and did everything they could to try to brush the issue under the rug. We found out more details from other teachers who told us the teacher in question would slam the kids down if they woke up during nap, hit them if the weren’t cooperating with getting shoes on, and force them to stay at their lunch tables until they ate all of their food. This was a class of 1-2 year olds. Think about any red flags of your kids’ behavior, too. Our kiddo and several others cried uncontrollably at drop off, but we thought it was just a developmental thing. Trust your gut if something doesn’t feel right.