Comparative curriculum shopping is like weighing the price of apples against that of toothpaste.
Costs vary widely, for very different packages.
Some have student booklets with tear-out sheets. Some have tapes and CDs. Some reviewers like simplicity, some like ease of preparation, and some value imagination above all. What follows is a guide, not a scientific comparison. If you are looking for a biblically based curriculum resource, usable for different age groups in a variety of settings, this may meet your needs.