Ready or not, across the country, a new crop of kindergarteners has entered the K-12 school system. Their teachers will spend these early weeks determining where the 5- and 6-year-olds are developmentally, what academic, social and emotional skills they bring, and what support they need to set them up for a successful school year. The last few classes of kindergarteners have shown up lacking some of the basic skills and competencies that educators and school leaders had previously come to expect. These include following instructions, sharing, listening and participating during lessons, using writing utensils and craft materials, and toilet training.