Practice writing the number 19 in your Yellow Book.
Watch this video. It is a book with very few words. Watch what is happening in the picture, and you make up the words to explain what is going on. Go to your Yellow Book and make your own story without words. Fill up all of the squares. Make a plan before you start drawing. What is the beginning? What is the middle? What is the end? Show your story to someone. Do they understand it without the words?
Listen to the letter sound song. Practice your letter sounds.
Splat 1-20 with a yellow splat. Then, you can count to 20 using whatever color you want.