The+Read+&+Write+Web

[|WebLessons] is an online learning system that makes it easy for students in grades K-12 to learn from the best sites on the World Wide Web. WebLessons combines a structured online learning experience with teacher-approved resources and three types of assessment that emphasize higher order thinking. More than 700 standards-based lessons are now available in Social Studies and Science, together with comprehensive Instructor's Guides that contain differentiated learning activities, grading rubrics, professional development, and more. . (subscription/license based)