District

idnamelocation
1District ANew York
2District BCalifornia
3District CTexas
4District DFlorida
5District EIllinois

School_Grades

idgradedescription
1KindergartenEarly childhood education program
21st GradeFirst year of primary education
32nd GradeSecond year of primary education
43rd GradeThird year of primary education
54th GradeFourth year of primary education

District_School_Grades

district_idschool_grade_id
(→ District.id)(→ School_Grades.id)
11
12
21
22
31
32
41
42
51
52