Colorín Colorado :: Assessment of English Language Learners (Webcast) This 45-minute webcast is a thorough introduction to assessment for teachers of English language learners. Dr. Lorraine Valdez Pierce will discuss performance-based standardized assessments; assessment as a tool for informing instruction; use of assessment to reinforce reading comprehension; and student self-assessment and self-monitoring. in Assessmentwith assessmentellspiercewebcast