St. Xavier's Alumni Association of Burdwan. The association that connects the past students of St. Xavier's School Burdwan to their very own alma mater to relive the life they lived years ago. It was the initiative of Late Fr. Alexander that Xaab was formed. Xaab was thus formed in the year 2000 with the active participation of the former-students, Late Fr. Alexander and supported by the then principal of St. Xavier's School Burdwan Fr. Sebestian. The first official meeting was held on 2nd January 2000.

XAAB runs the evening school where 52 underprivileged children studies free of cost. All the expenses are done by XAAB throughout the year along with salaries of the teachers.