| Grade | N | Average | T-test (P) |
NC | before overseas learning | 85 | 3.73 | 0.000165816 |
| after overseas learning | 85 | 3.31 |
|
TC | before overseas learning | 85 | 2.81 | 0.000000359 |
| after overseas learning | 85 | 4.18 |
|
AT | before overseas learning | 85 | 4.03 | 0.575216149 |
| after overseas learning | 85 | 4.09 |
|
SK-1 | before overseas learning | 85 | 3.64 | 0.010366061 |
| after overseas learning | 85 | 3.89 |
|
SK-2 | before overseas learning | 85 | 3.44 | 0.279562962 |
| after overseas learning | 85 | 3.58 |
|
AW | before overseas learning | 85 | 3.85 | 0.013990031 |
| after overseas learning | 85 | 4.13 |
|
IC | before overseas learning | 85 | 3.58 | 0.242450621 |
| after overseas learning | 85 | 3.86 |
|