[BlindMath] Request for Information about Materials on Secondary and Tertiary-Level Mathematics in Audio

[Saaqib Mahmuud]

Hi BlindMath mates? How are you? 

I am a visually impaired student of mathematics working as a college teacher of the subject here in Abbottabad, Pakistan. 

Are any audio materials available on mathematics for students of secondary, high school, or college levels? Is so, from whom? 

Regards.
Saaqib Mahmood
Contact No. (Mobilephone + WhatsApp + Skype): 0092 334 541 7958