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

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

She noticed an improvement in her playing with the opportunity.

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.

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

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

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

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

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