I would suggest that you search out the true history of our country. Learn what THEIR sources were for education, observe their level of intellect and that of their children. The Bible was their basic text from which children learned to read and provided a very firm foundation for their precious minds. It undergirded everything and still should. Read about what people such as Thomas Jefferson read. These people make us look like intellectual pygmies; we have lost so much. Those people were WELL equipped for the issues of their day. Our foundations should be similar.

Why would you assume (seemingly disparagingly) that anyone would suggest that the Bible would be the only source of wisdom and learning for children, or adults for that matter?

Jefferson, for instance, was multilingual--4-6 languages from a light search. They were serious about education back then. Homeschooling opens up a vast playground for those fortunate children who participate. Those kids are not held back from anything they might like to learn; most are voracious students.