What Does Research Say About Early Childhood Education?
NAEYC position paper on curriculum, assessment and program evaluation
Early Childhood Environment Rating Scale (ECERS)
Teaching Strategies, Inc.
High/Scope Preschool Assessment:
A Guide to Developing a Balanced Approach by Ann S. Epstein, Lawrence J. Schweinhart, Andrea DeBruin-Parecki and Kenneth B. Robin

State of Connecticut Frameworks
Connecticut Preschool Curriculum Framework
Connecticut Preschool Assessment Framework

Links to online assessments

Commercially available assessment tools:
Teaching Strategies' Assessment Resources
High Scope Assessment