Augmentation of the World-Class Instructional Design and Assessment (WIDA) Consortium English Language Proficiency Standards. Using TESOL's 1997 publication, ESL Standards for Pre-K-12 Students as a foundation, the new PreK-12 English Language Proficiency Standards expands the scope and breadth of ESL content standards. This volume provides an invaluable resource for each and every educator of English language leaners and a model for states and districts (TESOL).