An increasing number of students are using their college textbooks as tools to study for their college exams.

The students are not using the textbooks to improve their performance, but to supplement their studies with knowledge from their school library, a new study by Princeton University researchers found.

The study, published online by the journal PLOS ONE, looked at whether the use of college textbooks by college students was a reflection of an increase in the quality of instruction in schools or a sign of declining quality of education.

According to the study, students who use college textbooks tend to have higher average SAT scores, as well as lower average ACT scores.

This, in turn, increases their chances of obtaining a college degree.

However, this does not mean that these students are better prepared to take their college exam, the researchers said.

Students using college textbooks are also more likely to have lower SAT scores and lower average SAT score, as a result of lower grade point averages.

However these differences are not large enough to significantly alter the exam outcome, the study found.

The authors suggest that it is important to distinguish between the quality and quantity of an educational experience.

“Students with better grades on average and more SAT scores tend to be better prepared for college,” said lead author Michael A. Luebke, a professor of education at Princeton University.

“We know that students who take college courses have higher SAT scores but this is not a cause for concern, because these students also have higher GPA and ACT scores, which will help them get into a better college.”

He added that it would be helpful if students used their textbooks to supplement what they have learned in school.

“It would be nice to see students using their textbooks as an extension of their learning and help them remember things that they would normally forget,” he said.