Centre for Innovation in Mathematics Teaching
Mathematics Enhancement Programme
This is a UK site that essentially has a free curriculum for grades K-12. You must email and ask for a password to a few of the texts, but they are cooperative with homeschoolers. At first the site seems a little challenging to navigate, but quickly becomes self-explanatory
Cleave Books
Free Teacher Resources for the Above Programme
Understanding Algebra (textbook)
The Normal Mental Arithmetic:
a thorough and complete course by analysis and induction
by Edward Brooks
19th Century School books
The North American Arithmetic:
part first, containing elementary lessons
by Frederick Emerson
19th Century School Books
First Book in Arithmetic
by Milton B. Goff
19th Century School Books
First lessons in numbers: oral and written
on the basis of works by Benjamin Greenleaf.
Henry B. Maglathlin
19th Century School Books
A First Book in Algebra
by Wallace C. Boyden
Gutenberg Text
Philosophy and Fun of Algebra
by Mary Everest Boole
Gutenberg Text
The Foundations of Geometry
by David Hilbert
Gutenberg Text
Elements of Abstract and Linear Algebra
Edwin H. Connell
pdf and other versions
Ray’s Algebra
by Joseph Ray
Page Images at 19th Century Schoolbooks
The First 100,000 Prime Numbers
by Unknown
Gutenberg Text
A List of Factorial Math Constants
by Unknown
Gutenberg Text
Ray’s Arithmetic on CD, Basic Math through Advanced Calculus: $59