To inculcate healthy competition among students, inter-house & open competitions are held throughout the year. The students compete in almost every activity including dramatics and athletics at the inter-house level. For this the students are grouped in four houses viz. EMERALD, RUBY, SAPPHIRE & TOPAZ. Total of points earned in each competition by a house during the year decides the winner of the trophy for Best House of the Year. A Best Student of the Year trophy is awarded to the highest achiever in academics, sports, skills, discipline etc. put together.

Sesomites celebrate birthday in a unique way. Instead of wasting money by distributing chocolates, they contribute to a birthday fund. Once in a year they utilize the fund for distributing educational aids and sports equipments to the schools in backward areas of the town.

Although excellence in academics is the cornerstone of child development at SESOMU, due importance is attached to an all-round emancipation through various co-curricular activities. Activities such as debate, quiz, declamation, mono acting, music, dance, dramatics etc. form part of the school curriculum. Environmental awareness, love for nature and concern for fellow human beings is taught to students by participation in various hand-on projects. These events help qualities of reasoning, leadership, compassion and creativity to flourish in young mind.

The school has established a Health Club of its own. The sole purpose of this Health Club is to keep students abreast with different activities related to health awareness. On every Saturday, a student delivers a short speech on a particular topic related to health in the morning assembly. Apart from this, renowned medical practitioners are invited to make the students aware of good healthy practices. Write-ups related to health awareness are also put up on the Health Club Notice Board on a regular basis.

The school has also set up an Eco-Club in order to make the students aware of different aspects of our environment and ecology. The fundamental purpose of the Eco-Club is to conserve the local environment while raising awareness in the community and promote ecological education. The Eco-Club routinely takes field trips to help the students learn about the local culture and help them become aware of the environment. The main objective of this club is to make the students aware of the gradually degrading condition of the environment. The club also organizes regular plantation programs in the town.

Twice a year they are taken to nearby towns to see historical, industrial or amusement facilities. Learning in the classroom is complemented and supplemented by undertaking educational tours. Students are taken on educational field trips at least once in a year. The tour encompasses visits to an industry, an agricultural farm, a historical place, a museum, or an establishment, to enhance their knowledge.

A sports day is organized every year to bring out skills in various sports.

To create awareness among the students, parents and the public at large, the Annual Function of the school is theme based. Environment, Pollution, Peace, Girl Child,  Unity, Karmyoga are just a few of such themes.