I forgot to include an important site in The Best Resources On Pre-School Parent Engagement — The National Center On Parent, Family and Community Engagement.
Here is how the website describes its purpose:
The National Center on Parent, Family, and Community Engagement will identify, develop and disseminate evidence-based best practices associated with the development of young children and the strengthening of families and communities. The Center will create culturally and linguistically relevant training and tools for implementing comprehensive, systemic, and integrated approaches to parent, family and community engagement in Head Start and Early Head Start.
It’s filled with useful resources, including multimedia.