Want to customize few thing in Open edX

Hi All,
Please guide me i wanted to make few changes into EDX
I want to create custom class at the time of reg the user and create content according to that class from studio and Show content to that class only

I want to give option in drop and a user select class 9. Content creators create course for only for class 9 and student of that class only content created for those

please guide me

I’m not sure to understand you question.
Please check if the cohorts feature is of any help. You may create some content and assign this to a specific content group. Then you add the student to a new cohort and assign this cohort to the content group just created.

Hope it helps