H.M. Senior Secondary School (popularly known as Happy Model School) was started in the 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 the Society. Mr. Arora is a philanthropist and has keen interest in spreading quality education among the masses. It is noteworthy that H.M. Senior Secondary School is the most affordable private school in Gurgaon. The school has all ultra-modern facilities, its low fees not with standing.