Limits of humans. i swear i'm not a serial killer i'm just a writer. <-- isn't that basically the same thing. Pinning this for the info AND the comments^^ I'm not a serial killer, I'm a forensic scientist
King School Library - Links to Multiple Free Typing Games (Keyboard Practice) - Check out out these typing tutorials and games to practice your own typing skills. Practice, practice, practice, and maybe someday you'll type as fast as I do.
On the Shelves Snapshot: Practising Addition with Beads
Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ?