It does not have anything to do with small or big where you study. It is the size of your effort that counts.
Yes, a small college helps in achieving more success in the classroom. Because success is not determined by the size of the class. It is determined through your focus and commitment in the field you are in. Also, your class participation and clearing of doubts not just through professors but also through self-research helps you to be successful and ahead in your classroom.
All the best!