H.M. Senior Secondry School (popularly known as Happy Model School) was started in year 2000 with 67 students by Children Welfare Education & Social Welfare Society, Gurgaon. Mr. O.P. Arora, a retired horticulturist from Haryana Government, is the president of society. Mr. Arora is a philathropist and hass keen interest in spreading quality education among the masses. It is noteworthy that H.M. Senior Secondry School is most affordable school in Gurgaon. The school has all ultra-modern facilities, its low fees notwithstanding.The school was affiliated to Haryana Board Of School Education Haryana till 2012. Now the school is affiliated from Central Board Of Secondry Education, Delhi