Happy Sss Kosli
| School Name | Happy Sss Kosli |
| Address | Kosli, Nahar, Rewari, Haryana |
| Location | Kosli |
| City | Rewari |
| District | Rewari |
| State | Haryana |
| Pincode | 123302 |
| Category | Higher Secondary School |
| Block | Nahar |
Happy Sss Kosli is located in Kosli, Nahar, Rewari, Haryana and was established 31 years ago. This school is a Co-educational and is located in Rural area. This is a Higher Secondary school and is currently operational. It's affiliated with CBSE Board for class-X & class-XII exams. The school is managed by Private Unaided (Recognized). It is located in 73-Kosli assembly constituency. The school falls under Rohtak parliamentary constituency. This is primarily Hindi medium school but English is also spoken during classes.
| Class I to V | 134 Students |
| Class VI to VIII | 76 Students |
| Class IX to XII | 116 Students |
| Total Students | 326 Students |
| Total Teachers | 21 Teachers |
| Student-Teacher Ratio | 16:1 |
| Student-Classroom Ratio | 19:1 |
This school has enrolled around four hundred students who are taught by 21 teachers, thus making the student-teacher ratio of 16 students per teacher. All of the teachers are appointed on Regular basis. Eight teachers are Male and remaining thirteen are Female. In terms of Academic qualification five teachers are Graduate and rest sixteen are Post Graduate. Three teachers are trained in Computer. The student classroom ratio is 19:1, means on an average nineteen students sit in a classroom which is very good. There are 134 students in class I to V, 76 students in class VI to VIII and 116 students in class IX to XII.
The school is in a private building and it has pucca boundary walls. The school has total seventeen clasrooms and seventeen other rooms. The school has internet facility for students. The school has one laptop, four scanners, four printers, twenty LEDs, one webcam and two generators in its premises. There is both reading corner and library for students. There are six boys toilets and six girls toilets for students. The school has both hand wash facility and drinking water facility for people.