Amazon is offering 50% off or more on Office & School Supplies Lightning Deals.
Upto 15% off: Product page > Apply coupon. May not be applicable on few products.
Amazon: Office & School Supplies Lightning Deals (On Mobiles select Desktop site > All Deals)
Example: Derwent Academy Visual Art Diary Sketch Pad 80 Pages Rs. 58 (Apply coupon > Automatic discount in step Place Order)