The door frameWren's cousin Dax was thirteen, and he typed so quickly that his hands were a blur. Wren tried too, one careful key at a time. "I will never be as quick as Dax," she sighed. Her mother led her to the door frame and marked her height with a pencil. Beside it were older marks, one for every birthday. The marks went up and up, and every one of them was Wren. Each mark raced only the mark just before it. Wren grinned, because she could see how far she had grown. Typists give a best in words a minute, the words typed in one minute. A typist's word is five key presses, spaces too, so fifty key presses make ten words. Your best is the top step of your own ladder, and a best only counts when it is careful. Nothing in this lesson is timed.