Trace Numbers 1-20: In these six number tracing worksheets kids trace all the numbers, half the numbers or only a few of the numbers. Helpful for number writing practice and counting in order. Would work well for assessments, too.
Doing math in your head (like the Germans) is easier if you think in blocks of 10. Here's a fantastic graphic for school kids that can help you build up the skill of doing math in your head. (I couldn't do it until I moved to Germany and learned the metric system--now it's quick and easy for me to do math in my head!)