Scholastic has created a Learn at Home database with projects to keep kids reading, thinking, and growing. 

From their page: 

"Even when schools are closed, you can keep the learning going with these special cross-curricular journeys. Every day includes four separate learning experiences, each built around a thrilling, meaningful story or video. Kids can do them on their own, with their families, or with their teachers. Just find your grade level and let the learning begin!"

-The Editors of Scholastic Classroom Magazines.

Age of Learning is offering access to ABC Mouse, Adventure Academy, and ReadingIQ based on Education Level. For students grades 2-8.

Comprehensive Learning Management System for K-12 Music Education.  Currently free via a mailchimp signup during COVID-19 closures. 

BrainPOP - Animated Educational Site for Kids - Science, Social Studies, English, Math, Arts & Music, Health, and Technology.  Full access for closed schools. 

Breakout Edu offers activities for students.  Check out this video for more information: Video

Elementari teaches kids to write code and interactive stories. 

Online learning for younger students.  While not completely free, adaptive math and ELA courses are free to start.

Aligned for UK learning standards, this program teaches kids computer skills from a young age. 

Provides education guides for Chemistry at the Junior High Level in English and Spanish.

Always free DeltaMath teaches mathematic principles.  

Free educational videos on various subjects starting at the Junior High level. 

Music programs from the Berlin Philharmonic Orchestra are now free to stream via the Digital Concert Hall.  Check out the link for information on how to view streaming concerts.

From the site:

"Journey through nearly 14 billion years of history in this self-guided, six-hour version of Big History. You'll find every chapter full of great activities to keep you entertained and test your learning."

A six-hour version of the Big History Project is available without signing in. 

PBS Nova has high-quality science videos to watch at any time. 

An article with numerous tools for distance learning. 

Learning for Junior High through Adulthood on the use of google digital applications.  

For some in need of internet access, this option from Comcast may help. 

Get free access to thousands of movies with your library card.