How to create user profile as per role

Hi,

I have different roles in site like schooladmin, teacher, student etc.

Every role user has different registeration form fileds.

Please help me how to i can create fields as per role i am using profile module that Supports configurable user profiles but it will display all field in registration form for all roles.

School admin has following fields:

id
admin_name
Address
City
State
Country
Phone1
Phone2
Fax
Email
school_id

Teacher has followinf fields:

id
School_id
Teacher Name
Date of Birth
Gender
Email
Qualification
Date of Joining
Total Experience
Proffered Subject
Present Address
Permanent Address

Student has followinf fields:

id
School_id
FirstName
Last Name
Date of Birth
Gender
Father Name
Address
City
State
Country
class_id
Date of admission
etc..

Please help me.