Migrate master data - add a new object and reorder old relationships

I am transferring master data - manually.

I have a class object that has a one-to-many relationship to a Grade entity.

Now I want to create a new object - let's say ClassTrack

• A class will have a one-to-many relationship with ClassTrack = Class <--- → ClassTrack
• Move class relation to ClassTrack so = ClassTrack <--- → Grades

With this, I want to create a new ClassTrack object for every day that the grade was recorded , and then add the grades belonging to this date to the ClassTrack / Grades relationships.

So how am i

• to create a new ClassTrack object - user migration policy

• Create a relationship with the appropriate gradations for the date.

So, for example: Grades were created on - 1/12/2012 @ 9: 00 - 1/12/2012 @ 10: 00 - 1/15/2012 @ 8: 45 am

I want to create a new ClassTrack object for 1/12/2012 and 1/15/2012. Add two classes 1/12/2012 to the first ClassTrack relationship and a ratio of 1/15/2012 to the second ClassTrack class.

Any suggestions would be highly appreciated. Thank.