This is a terrific find! The Scott Foresman site offers a free grammar & writing curriculum for grades 1-6 (separate "handbooks" for each grade).
The books are broken down into lesson-sized links, making downloading (to .pdf) quick. and printing convenient. The lessons are written in a large font with black and white graphics included.
Go here to view the Scott Foresman Grammar & Writing Handbooks.
Thank you, Jenn, for this high quality, 100% free, educational find!