6 to 12 class (sanskrit ) materials available this site :- https://www.samskrittutorial.in
sanskrit class 8 :- https://play.google.com/store/apps/details?id=com.kesu.aptech.samskrit
Samskrit materials(videos/pdf/script) available app (application )
6 to 12 class app also available play store, https://play.google.com/store/search?q=samskrit%20tutorial