Clarissa Willis, Ph.D. has been working in the field of early childhood education for more than 20 years. Clarissa is a frequent keynote speaker and presenter at regional and natio...vizualizați mai multeClarissa Willis, Ph.D. has been working in the field of early childhood education for more than 20 years. Clarissa is a frequent keynote speaker and presenter at regional and national early childhood conferences. Her articles on child development and early childhood special education have been published both nationally and internationally.vizualizați mai puține