How to view columns in a gridview dynamically

[skyboy]

I have two tables in my database, one for teachers and another for students. The students table has column for name, admission no., math’s, English, computer, agric. Different teachers are responsible for each subject. I have a gridview that shows all the columns, but I want only the teacher responsible for each subject see the columns for Name, Adm_no and his subject only (e.g Agric teacher will only see d column for Name, Adm_no & Agric) I’m using session as the parameter