These are national or international charities focused on literacy teaching, book distribution, and other activities that promote reading and writing. They are all highly rated by Charity Navigator. 

1. Books for Africa 

2. Children's Literacy Initiative

3. Ferst Readers

4. Reach Out and Read 

5. Reading Partners

6. Room to Read

7. Worldreader

One of the world’s premier literacy educators.

He studies reading and writing across all ages and abilities. Feel free to contact him.