## District

id | name | location
--- | --- | ---
1 | District A | New York
2 | District B | California
3 | District C | Texas
4 | District D | Florida
5 | District E | Illinois

## School_Grades

id | grade | description
--- | --- | ---
1 | Kindergarten | Early childhood education program
2 | 1st Grade | First year of primary education
3 | 2nd Grade | Second year of primary education
4 | 3rd Grade | Third year of primary education
5 | 4th Grade | Fourth year of primary education

## District_School_Grades

district_id | school_grade_id
--- | ---
(→ District.id) | (→ School_Grades.id)
1 | 1
1 | 2
2 | 1
2 | 2
3 | 1
3 | 2
4 | 1
4 | 2
5 | 1
5 | 2