Repertoire for Elementary to Intermediate

[stee]

I have recently discovered the wonderful materials by Rollin, Sonatina in Colors, Jazz Sonatina by Vandall, Motion Machine by Miller, Toccata for two, et al.  They are very successful pieces for teaching and performance.  

I have spent a lot of money searching for other great pieces with no luck.  Does anyone have recommendations for other sucessful pieces at these levels?  

Thanks so much.