Pearson Education will start updating ebooks more than printed textbooks to push students away from the market in used textbooks.
"The student debt crisis is real and it's crushing millions of people -- especially people of color," Warren said.
"I was expected to make a $400 loan payment every month, but I had no money, no sustainable income. College ruined my life."
A quarter of the 60 wealthiest universities leave low-income students owing more than $20,000 in loans.
Young voters, more likely to be in deep college debt, are an important part of the Democratic coalition.
The more generous the government becomes with grants and loans, the more schools raise their rates.
A Wharton School professor turns the usual college advice on its head: Forget STEM and pick a course you like and are good at.
Which graduates earn so much they can repay their loans on time?