Proofread this excerpt from an essay. Which part of the excerpt contains a grammatical error? Students who take field trips are more likely to have better grades, graduate from high school, and go on to college. Educational field trips has a positive, lasting impact on students' education and future job opportunities. The president and CEO of the US Travel Association, Roger Dow, said that field trips can inspire students to travel later in life. He also noted that if students don't see the world outside their neighborhoods, they will miss out on a lot.