improving ppl adjective. 
[ɪm'pru:vɪŋ] M17.[from IMPROVE verb2 + -ING2.]That makes or becomes better; 
spec. that improves the mind, understanding, or character.
■ A. J. P. Taylor No Sexton Blake, no comics, nothing but improving works. ■   improvingly adverb M19.  [TahlilGaran] English Dictionary ▲