Complex sentence: Smart School Systems is a school in Islamabad, Pakistan, offering education from the Montessori level to O Levels, with branches based in Islamabad, Attock and Peshawar.
Split into simpler sentences: Smart School Systems is a school in Islamabad, Pakistan. A school system offering education from the Montessori level to O Levels, with branches based in Islamabad, Attock and Peshawar.