College students are struggling with the cost of textbooks. There's a push in Congress to make them free.

• College students say they often struggle to afford to pay for textbooks.
• Two-thirds of students reported skipping buying course materials because they were too expensive.
• Some members of Congress have joined the movement to provide free textbooks to university students.

Going to college in America is expensive. But it's not just tuition or room and board. Textbooks continue to eat up a significant amount of college students' budgets.

Claudia Munoz, a New Mexico State University sophomore, spent $500 on textbooks alone this semester. Her courses also required her to spend even more on online codes and access fees. 

"I still have the online fee for textbooks that are included in the course," she said. "It's hard for me because I'm a full-time student and I only work part-time."