"There is not a square inch in the whole domain of our human existence over which Christ, who is Sovereign over all, does not cry: 'Mine!'"
Amazon.com, the place to get great values on new and used books
Australian Bill Handley's Speed Mathematics that teaches wonderful mental mathematics skills.
The MacTutor History of Mathematics Archive, by the mathematics department of St. Andrews University in Scotland.
Key Curriculum Press, a place to explore a wide variety of mathematics resources.
Two excellent essays on the philosophy of science and mathematics from a Kuyperian (covenantal) perspective by Dr. Donald H. Petcher, Professor of Physics and Department Chair, Covenant College.
CelestAire, where to order state of the art navigational equipment, including inexpensive astrolabe models.
Excellent Biblcal Christian Math Resources developed by Katherine Loop.
The American Chesterton Society, a site devoted to the thoughts and writings of G. K. Chesteron (1874-1936), English essayist, critic, novelist, and Christian apologist.
Into the Wardrobe, a site devoted to C. S. Lewis (1898-1963), British writer, critic, and Christian apologist.
The Shelter, a summary of the writings of Christian apologist Francis Schaeffer (1912-1984).
A site devoted to the analysis of the scientific and theological writings of Thomas F. Torrance (1913-2007).
Center for Cultural Leadership, founded by Andrew Sandlin.
Transforming Teachers, an educational resource.
Light Educational Ministries: exists to serve educators with a Biblical Christian world view and nation-transforming focus.
The Truth Project: an introduction to the Biblical Christian World View.
Retrosheet, a place to find a great many historical boxscores, rosters, schedules, standings, etc., starting from 1871 to present.