McGuffey Spellers/Project Gutenberg

Primer through grade 12. See An Old Fashioned Education for a grade-by-grade guide for these books.

Comprehensive History of Western Civilization through 16th Century

This site is a wonderful resource! See their time line from the founding of Rome in 753 BC through 1566 - the Ottomans conquer European territories in the Balkans. Links to free resources and online books are given from the time line. The free books are page scans of the books with no comprehensive downloads offered; however, if you use the Google Books Search on my side bar, you may find it in a download friendly form(PDF). Also try Gutenberg Books, also on my side bar, and a general Google search.

Some of these books have already been listed here, but I will attempt to add more of them here.

They offer fairly reasonably priced CD collections as well.

Economics in One Lesson/Other

Downloads for this classic economics book written by Henry Hazlitt, 1946 here.

Nature Study by Grades(One - Three)Teacher's Book/Google Books

Title Nature study by grades: teachers' book for primary grades, Volume 1
Author Horace Hall Cummings
Publisher American Book Co., 1908
Length 180 pages
Overview

I could not find the student's book, but this book could be used as both student and teacher's text.

Nature Study by Grades - Sixth Through Ninth/Google Books

Covers topics by season.

Title Nature Study by Grades(a textbook for grades six, seven, and eight)
Author Horace Hall Cummings
Publisher American Book Company, 1910
Length 274 pages
Overview

Irish Fairy Tales/Google Books

Title Irish Fairy Tales
Author James Stephens
Illustrated by Arthur Rackham
Publisher The Macmillan company, 1920
Length 314 pages
Overview

Our Old World Background/Google Books

Title Our Old World Background
Authors Charles Austin Beard, William Chandler Bagley
Publisher The Macmillan company, 1922
Length 504 pages
Overview

Very general coverage...probably for fifth or sixth grade.

All the Year Round:a Nature Reader, Part One: Autumn/Google Books

Title All the Year round: a Nature Reader, Part One: Autumn
Authors Frances Lucia Strong, Martha Allen Luther Lane, Margaret Lane
Publisher Ginn & Company, 1898
Overview

Farm Friends and Farm Foes/Google Books

Title Farm Friends and Farm Foes: a Text-book of Agricultural Science
Author Clarence Moores Weed
Publisher D.C. Heath & Co., 1910
Length 334 pages
Overview

A Book of Sea Stories/Google books

Title A Book of Sea Stories
Volume 15 of The young folks' library
Author Cyrus Townsend Brady
Publisher Hall & Locke Co., 1901
Length 376 pages
Overview

Little Journeys to the Homes of Eminent Artists/Google Books

Little Journeys to the Homes of Eminent Artists
Author Elbert Hubbard
Publisher The Roycrofters, 1902
Overview

A little wordy and eccentric, but interesting back stories. If you are studying the Arts and Crafts movement, Hubbard was influential in the United States.

More about The Roycrafters here.

The Garden Swing, and Other Stories(Reader)/Google Books

Title The Garden Swing, and Other Stories:
Publisher T. Nelson and Sons, 1885
Overview
Appears to be third to fourth grade level reading

Myths of Northern Lands: Narrated with Special Reference to Literature and Art

Title Myths of Northern Lands: Narrated with Special Reference to Literature and Art
Author Hélène Adeline Guerber
Publisher American Book Company, 1895
Length 319 pages
Overview

The See and Say Series Readers Book 1/Google Books

Book One, as the title-page explains, is a Picture Book, which, by means of its pictures and stories, presents and teaches the sounds of the letters of the alphabet, with simple lessons in word building.

The See and Say Series, Book 1, Teacher's Manual 

The See and Say Series Book 1

I ordered this book via QOOP, on the sidebar on main page at link. They will print the exact PDF as a paperback book copy for you. I've been going through this with my daughter(Pre-K/K) who is enjoying all the adventurous pictures, which are stories unto themselves. This is an enjoyable beginning letter sound/phonics book.

Language, Grammar, and Composition(6,7,8 grades)/Google Books

Title Language, Grammar, and Composition
Authors William Franklin Webster, Alice Woodworth Cooley
Publisher Houghton, Mifflin and company, 1905
Length 385 pages
Overview

Book of Cats and Dogs, and Other Friends, for Little Folks/Google Books

Title Book of Cats and Dogs, and Other Friends, for Little Folks
Author James Johonnot
Publisher D. Appleton and co., 1887
Length 96 pages
Overview

The Literary Reader for Higher Grades, Book 6/Google Books

Title The Literary Reader for Higher Grades, Book 6
The Literary Reader for Higher Grades, Kate Forrest Oswell
Authors Kate Forrest Oswell, Charles Benajah Gilbert
Publisher The Macmillan Co., 1912
Length 591 pages
Overview

October Squirrels Multi-grade Stories

The Wide Awake Third Reader, The Baby Squirrels(science)

Elson Primary School Reader: Book 4, The Squirrels at Walden

St. Nicholas, Volume 12, Part 2, The War with the Little Red Skins

The Merrill Reader, First Grade, We Play with the Squirrels

Theodore Roosevelt's Letters to His Children - Page 226

The Character Building Reader: Second Grade - Page 116

Fourth Year Language Reader

Teacher's Magazine, In Nutland and Nature Stories

Stanley and the Squirrels, Heath Second Grade Reader, 1903

The Squirrel's Pilgrim's Progress: a Book for Boys and Girls, 1915

Squirrels and Other Fur-bearers, 1900

Wild Animals at Home, 1913

Farm Friends and Farm Foes, 1910

All the Year Round: a Nature Reader, Part One: Autumn

Activities:

Squirrel lacing craft

Preschool squirrel cut and find

Squirrel paper doll

More soon...

Squirrels and Other Fur-bearers /Google Books

Title Squirrels and other fur-bearers
Author John Burroughs
Publisher Houghton, Mifflin and Company, 1900
Length 149 pages
Overview

The Boys' and Girls' Readers: Sixth[grade] Reader/Google Books

Title The Boys' and Girls' Readers: Sixth[grade] Reader
Author Emma Miller Bolenius
Publisher Houghton Mifflin, 1919
Overview

Teacher's Manual