The Delhi Psychiatric Society gives the details of certain special schools at Delhi  in their website http://www.delhipsychiatricsociety.com/  under the head Learning Disorders.

ABHILASHA (SPECIAL SCHOOL)
E-24-B, MIG flats Maya Purl, New Delhi.

STHA SPECIAL SCHOOL                                                                                   
A-30, Sanjay Nagar, Near Jaipur Golden Hospital,
Sector-2, New Delhi110087

BHARTIYA VIDYA BHAVAN
Special Education Department, Kasturba Gandhi Marg,
New Delhi.-110001
Ph.3389943, 3389944, 3384139.

BLESSING, CENTER FOR SPECIAL CHILDREN (MENTALLY HANDICAPPED, SPASTICS AND SLOW LEARNERS)
4-B,Friends Colony, Jharsa Road,
Gurgaon.(Haryana)

CHILD GUIDANCE
Department of Social Work,
University of Delhi, Campus, Delhi.

EDUCATUMSpecial School A-225, Suryanagar,
Ghaziabad (U.P.)
Ph.91-4610281, 9811160802

INTEGRATED SCHOOLJamia Mila Islamia Special School,
Okhla, New Delhi, 110025

PURTI, CENTER FOR SLOW LEARNERS
Flat No.39, Block 9, Ashok Vihar-Phase III, Pocket B,
Delhi-110052.
Ph.7438114    http://purti.org/

SHRI RAM SCHOOL FOR INTEGRATIOND/3,Lane of Paschim Marg,
Vasant Vihar, NewDelhi -110057

SARASWATI NURSERY
Special Nursery, LadyIrwin College, Tilak Bridge, New Delhi 110002.
Ph.3736129

SHRISTHI
Special School & Dyslexia Center,10-Raj Block, Naveen Shahadara, Delhi,110032

http://www.shristi-institute.org/           This even offers NIOS.
SHRISTHISpecial School& Dyslexia center, 20, Vigyan Lok, Vivek Vihar, Delhi-110092

SAI PRAGYA INSTITUTE OF LEARNING AND REHABILITATIONSafdarjang Extension, IGNOU Road, Oposite Anupam Apartments, Delhi-10030.
Ph.6529158.

TAMANNA
D/6/Dvasant Vihar, New Delhi 110057.
Ph.68838853

UJALA SPECIAL SCHOOL
Subhash Nagar, Rajouiri Garden, Delhi.
Ph.5140196

VATSALYA
Special School, 37/21, Old Rajinder Nagar, New Delhi.
Ph.7471295.

Y.M.C.A. INSTITUTE FOR SPECIAL EDUCATION
YMCA Nizamuddin East, New Delhi-110013.
Ph.4699405, 4692406.

I hope such type of schools are available at all major places in India.