When going back to the old drug I have noticed improvement.

They were not good, but he had noticed a small improvement during the past year.

She noticed an improvement in her playing with the opportunity.

It may take weeks or months of use before you notice improvement in your skin.

One school noticed a significant improvement in the educational performance of its students.

It may take 2 to 4 weeks to notice an improvement while on this drug.

However, you may continue to notice improvement even after your treatment ends.

Some teachers have noticed an improvement in student behavior since the attacks.

It may take 1 to 3 weeks to notice improvement in your condition.

In fact, Will's teacher noticed a big improvement just after his first session.