This is a half-page worksheet (so you can print two per page!) of a grand staff with different notes written on treble and bass clefs. (They do not go together if you try playing them!) I write worksheets in such a way that they look like real music; students reading choir or piano music will generally see a grand staff with bass staff on the bottom, rather than the way most worksheet have it, with the bass clef all by itself.
This worksheet is also written so that students can read in a pattern of steps and skips rather than random notes; again, this is like a real score in that way.
The notes presented on the bass clef are from bottom line G to middle C; treble clef has from middle C to top line F. It is all in quarter or half notes so that they learn to read note heads with stems attached. (The direction of the stems confuses some students.)