Sarah Michelle Gellar is very aware that she needs to put her devices down when she’s around her family, which includes husband Freddie Prinze Jr. and kids Charlotte and Rocky. “I really try to be present. If I am helping my children with their homework, I put my phone away — and I don’t look up answers. I am like, ‘No, we’re figuring this out.’ We are not going to go on the phone and ask Alexa. We’re doing the work, and we’re going to feel better about ourselves for doing the work,” the 46-year-old, who is partnering with UScellular to encourage people to participate in Global Day of Unpluggi…