Resources should be determined by skill level and content rather than grade level. The resource list is by no means exhaustive. We encourage the user to become familiar with the library and use its valuable resources. Remember that most of the writers are secular in their thinking, so be very selective. Check each book by skimming through the pages, especially the beginning and the end.
Older books are generally conservative books and written with some spiritual emphasis.
Since public libraries do not carry Christian material, it is a good idea to start investing in a library at home. The cost for SOW materials may be high at first, but once you have purchased the resources needed such as a Bible dictionary, this will be used for 12 years by each of your students. This type of investment ends up being the most economical way to homeschool. Resources listed may not adhere to the same beliefs as the authors, but were still recommended because most of its contents were considered valuable. Each family is responsible to examine the contents for any false or misleading statements.