Our "Words We Know" wall is empty the first day of school, but the first thing I put up are the children's names. Then I follow the scope and sequence of our reading/LA series and our county give us the words on tagboard to use. We add about 2 or 3 words a week. My teaching partner puts all the words up right away. She goes over them all the time and her children do learn them rather quickly. She just spotlights the current words during that week.