Welcome to First Grade Certificates 50 Pack | Elementary School Classroom Supplies for Teachers | By Teacher Peach Each set of 25 certificates with mini-poster on the back will help students start the year well. Simply write each student's name on the front and pop it into an envelope for an easy-to-do welcome that will make principals smile, too. Your signature and the date make the certificate feel oh-so official. Permanent marker writes easily on the certificates without smudging. The mini-poster on the reverse side contains five terrific habits for first graders.