PS 307, the Magnet school for STEM studies from Pre-K to 5th Grade will offer walk-throughs for prospective families on Tuesday May 9th, May 16th and May 23rd at 9 am. No need to RSVP. If you have any questions, please email Marie Schoen . You can apply for free universal Pre-K online until May 9th for your child born in 2013.