corrective

"My friend told me there was something in the box, but I didn't know what it was yet. "

"The school's new restriction on cell phone use during class improved student focus. "

"The documents pertaining to my car insurance claim are now all submitted. "

"The medicine counteracts the effects of the poison. "

"The teacher made a correction to the student's spelling mistake. "

"Putting a wide vibrato on a single 16th triplet note at 160 beats per minute seems rather excessive."

"One way to encourage your employees to work harder is by giving them incentives."

"alkalies are correctives of acids"

"The student's time management skills were a limitation in completing the project on time. "

"The teacher was qualifying the assignment, listing all the specific requirements for each part. "

"The government's spending on education increased this year. "

"The navigator corrected the course of the ship."