Kumon Level and Grade Equivalent

A is for grade 1-2 
B is for grade 3 
C is for grade 4 
D is for grade 5 
E is for grade 6 
F is for grade 7 
G is for grade 8 
H is for grade 9 
I is for level 9-10 so pretty much 9.5. kind of... 
J is for grade 10 
K if for level 10-11. 
L is for level 11-12

2A is one level below first grade. 
3A is two levels below first grade and so on and so forth. 
∴1A is at grade level!!!