A family of Microsoft relational database management systems designed for ease of use.
OK, I found the problem and it wasn't your fault. Everything was set right, but there was some weirdness in that the query was reading the Text control for the month as a number rather than a text string. So it wasn't adding the Month value to the table. I fixed that by converting the value to a string. And then everything worked.
Also you will note that I entered the Month (for Center 1 & 12) as June 2016. You should enter Both Month and Year to distinguish from one year to the next.
I also made a couple of other changes. DOB did not belong in the Progress table it should only be in the Student table.
I set the controls in the second subform so they can't be edited except for the score. So the user can just type in the score, hit enter and it will go to the next row to enter the next score.
I also modified the code behind the Add Progress Records button so it doesn't display any warning messages.
So I reuploaded to My OneDrive.
Note: I'm leaving on vacation today, so I probably won't be able to respond as quickly for the next week.
But I think you understand more of how this works now.