sagacious

"He is a student of life."

"The school's computer network is a complex of interconnected systems, linking classrooms, libraries, and administration offices. "

"Choosing the right college requires discernment in evaluating different programs and campuses. "

"My daughter's teacher is very kind and helpful. "

"Here are some examples of different types of birds: robins, eagles, and sparrows. "

"Instead of the complex math problem, the teacher gave us a simpler equation to solve. "

"The new schedule caused confusion among the students. "

"The teacher anticipated the students' confusion about the new topic and explained it again, more slowly. "

"All he had to show for four years of attendance at college was a framed piece of paper."

"To explain a chapter of the Bible."

"The teacher's judgment of the student's essay was based on clear criteria. "

"He mentally reviewed the math problems before answering them aloud. "