The phrase "improvement work" means doing something to make things better or get rid of problems. It involves making changes or fixing things to make them work or look better. Full definition
The dashboard would put the data into a bar graph or pie graph for use in school improvement work and goal attainment. (mymassp.com)
Any money awarded is ring - fenced for improvement works, but for many schools, the subsequent energy savings allow for significant investment elsewhere. (qaeducation.co.uk)
Here's how to get the most out of your credit improvement work in the shortest amount of time. (creditscrubs.com)