Marzano Proficiency Scales Exemplars - This site has a large variety of examples of proficiency scales for content, including Common Core State Standards. The site requires creating a free login and password.
Connecticut Content area page - Provides a large amount of information in almost all content areas. Some content areas have better information than others.
www.achievethecore.org - Excellent site for Mathematics and English assessments and lessons based on CCSS. Washington State end-of-course exams - In the right hand corner, you will find the exams information for Mathematics, Reading and Science for the state of Washington.
Pennsylvania Assessment Creator - This site will create assessments in all four core areas. It allows you to choose from a question bank.
Pennsylvania Materials and Resources Search page - This is a search area that allows you to search for a variety of materials by subject area and grade. It has lesson plans, assessments, videos, etc...