If you don't believe me about QR in 1to30 newspapers to replace textbooks, maybe this video from Brazil will show you want I mean.

Instead of a book, consider a very similar experience in a 24 page black and white newspaper delivered to a classroom. That's why the title says 1 to 30. Then consider the cost of a black only newspaper that had content that was aligned with education standards and supported by ads from public health and ngos.