Opting out -- more and more college students say they're foregoing textbooks because of cost.

65% of students in a new national survey say they haven't purchased a required book because it was just too expensive.

"The average is about $200. I know myself I spent about $500 this quarter," said Rachel Goldberg, who goes to UC Davis and is with the advocacy group CALPIRG.

Ninety-four Aggies took part in the survey.  Most without books said they try to borrow from friends or study in groups.

"But ultimately, it is damaging to their grade," Goldberg said. 

Goldberg and other CALPIRG members are encouraging the continued development of "open source" materials.  Those are books from online companies and groups at discounted prices.