To encourage solo singing (or group singing-your choice!) you can print out these certificates and give them to participating students.
*To print smaller certificates, in your print dialog box, at the bottom go to "Copies Per Page" Select 2 to get quarter sheet size certificates, or 4 to get 8 certificates to a page!
*Images used were free, royalty free stock images that only came in color, I attempted to pick images that would also print/copy nicely in grayscale.
I'm open to tweaking this to meet other needs, just let me know!