A calming sound for students who educators say are still stressed out two years into a global pandemic. a new district-wide requirement for all students, at least 20 minutes devoted to mental health, every grade, every classroom, every day. and we found that they come back, a lot of times a shell of their former selves prior to the pandemic. so understand, we have to be patient, we have to persevere. reporter: school are where this emotional trauma shows up. hello. hello! so that human connection piece and being able to respond to one another, just human-to-human, that was something that some of our kids lost out on. reporter: the process is different for each age gup. for these kindergartners, red light/green light is a lesson of what to do when emotions boil over. when we play games like this, we might feel these strong