For the purpose of discovering some of the social and educational influences which affect pupil enrolment, participation in activities, and scholarship in the high school, the writer was engaged for three years in a study of the school population of a residential suburban community, the Lyons Township High School district, with buildings located in La Grange, Illinois. It is the object of this article to present some of the important findings of the investigation. The study is based on data obtained from blanks filled out by pupils in the high school under the direction of specially trained teachers, from blanks filled out by parents of other persons in the high-school district between the ages of seven and twenty-one years, and from records on file in the office of the high school. The returns are from 54.3 per cent of all persons in the high-school district between the ages of seven and twenty-one years. All pupils in regular attendance at the high school from September, 1923, to June, 1925, are included. The area which contains 98.6 per cent of the population of the Lyons Township High School district is predominantly a section of homes. The district has no large industries which require large numbers of poorly paid laborers. A large percentage of the householders are Chicago business and professional men who desire to rear their families away from the noise, dirt, and vicious environment of the large city. There are few apartment buildings, and the data show that 85 per cent of the parents of the pupils in the high school own their own homes. The data were grouped according to the occupations of the fathers of the individuals studied, the I.Q.'s of the pupils in the high school, and the scholastic success of the pupils in the high school in terms of teachers' marks.