Invite friends and family to your Back to School - Shaped Fill-In Invitations - First Day of School Classroom Invitation Cards with Envelopes. These back to school party invites are printed on sturdy card stock paper and have plenty of space to add the party details. Plus their unique shape will be adored by all your guests. Each set of 12 shaped fill-in invitations also includes 12 white envelopes making it easy to get your party invitations into the mail. Begin planning the perfect family gathering party with these invites!