However, I'd say most of the items are serious textbooks with a hefty price tag if you're going to try to buy new. You can pick up older editions for pretty good discounts, though.
Eventually I think we'll get there from a purely non-profit philanthropic perspective a la Khan Academy model. The problem is, as Khan has gotten bigger, they have lost some of what made it unique in the first place (topic, knowledge and mastery base has shifted to k-12 common core/ap alignment).
Coursera recently shifted all their comprehensive classes from free to some sort of $$ model. The one free comprehensive algorithms class from Princeton doesn't have the second half posted for many months. All these for-profit companies that start out free are destined to move to a pay per course model.
However, I'd say most of the items are serious textbooks with a hefty price tag if you're going to try to buy new. You can pick up older editions for pretty good discounts, though.
Eventually I think we'll get there from a purely non-profit philanthropic perspective a la Khan Academy model. The problem is, as Khan has gotten bigger, they have lost some of what made it unique in the first place (topic, knowledge and mastery base has shifted to k-12 common core/ap alignment).
Coursera recently shifted all their comprehensive classes from free to some sort of $$ model. The one free comprehensive algorithms class from Princeton doesn't have the second half posted for many months. All these for-profit companies that start out free are destined to move to a pay per course model.