remedial

"After years of research, the scientist discovered a curative for the common cold. "

"He is a student of life."

"It is difficult to provide for my family working on minimum wage."

"The teacher's answer was correct. "

"The student's knowledge of grammar was deficient, making it hard for her to complete the writing assignments. "

"She offered to help with her homework."

"He intends to go to university."

"Often used to imply membership of a large class."

"The students are subject to strict rules about late arrivals. "

"to assign a day for trial"

"The teacher patiently explained the math problem, and the students were able to understand the steps involved. "

"Buying more servers would improve performance."