In case anyone is curious:
Our Mark Twain:
Our Sheryl Crow:
Our (non-moustachioed) Walt Disney
The whole class:
From Top Left: Frank & Jesse James, Omar Bradley, Sara Evans, Sacajawea, Edwin Hubble, Some Race Car Driver, Some Wrestler, Mark McGwire, Harry Truman, Bloody Bill Anderson, Laura Ingalls Wilder, Susan Elizabeth Blow, Art Hains (uses wheelchair, just like the kid, so props to that kid!), Walt Disney, William Clark, and Mark Twain.