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