Is there an institute in Rawalpindi/Islamabad that provides training to become an instructor for special children education?

I know one. There is National Institue of Special Education in H-8/4, Islamabad. I don't know about Rawalpindi though

also is there any place where u can do volunteer ?

Found this list "LIST OF SPECIAL INSTITUES IN ISLAMABAD" at http://www.facebook.com/notes/safetyaid-co/list-of-special-institues-in-islamabad/130574453633061

Many of these probably are just schools and don't provide training, but they're still worth a look

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Al-Farabi Special Education Centre for Physically Handicapped Children Opp: ( Nori Hospital, G-8/4, Islamabad. Tel: 9260858 )

2 Al-Maktoom Special Education Center for Visually, Handicapped Children ( Rooh Afza Market, St. No. 14, G-7/2, Islamabad Tel: 9204999 )

3 Fatima Jinnah Special Education Center for Mentally Retarded Children ( H-8/4, Islamabad. Tel: 9257156)

4 Ibn-e-Sina Special Education Center for Mentally Retarded Children ( H-8/4, Islamabad. Tel: 9257323)

5 National Braille Press (Pakistan) (G-7/2, Near Rooh Afza Market, Islamabad. Tel: 9216566 )

6 National Institute of Special Education (Pakistan) (Near Rooh Afza Market, G-7/2, Islamabad. Tel: 9201566 )

7 National Library and Resource Centre ( G-7/2, Islamabad. Tel: 9222734 )

8 National Mobility and Independent Training Centre ( G-7/2, Near Rooh Afza Market, Islamabad. Tel: 9216566 )

9 National Special Education Center for Hearing Impaired Children (H-9, Islamabad. Tel: 9257437 )

10 National Training Centre for Special Persons (Opp: Nori Hospital, G-8/4, Islamabad. Tel: 9260098)

11 Vocational Rehabilitation and Employment of Disabled Persons (H-8, Islamabad Tel: 9257155 )

12 Vocational Rehabilitation and Employment of Disabled Persons (Service Centre-I)
(H-8/4, Near Commerce College, Islamabad Tel: 9257155 )

..
15 Special Education Centre for Physically Handicapped Children (N. No. E-115, Satellite Town, Rawalpindi Tel: 4455241)