This was the first Apologia science I used and it hooked me. Love the amount of info. I learn from everyone we do. However I wish there were some tests or worksheets just to judge how the kids are absorbing. I know it goes against our homeschool mentality of its better not too test but I much prefer the higher level science formats. Especially if you are new to homeschooling. It's harder for me to convince newbies to give it a try.