Write numbers from 0 to 20. Represent a number of objects with a written numeral 0-20 (with 0 representing a count of no objects).
Connect know representations of numbers, such as two counters, two fingers, or the utterance two, to written numerals and number names. Break this skill into multiple sessions. I really like the way JoAnn does it, as seen here. Write by tracing at first, then without tracing.