They have four levels: Beginner (ages 5-7); Level 1 (ages 6-8); Level 2 (ages 8-10); Level 3 (ages 10-12); and Level 4 (ages 12-14). There is also a "Traceable" level for ages 3 and 4, with the drawings already included in a light gray for children to trace. Teacher books come with specific instructions and cover two levels (Levels 1-2 and Levels 3-4 are combined), which helps with cost. The Old and New Testament Overviews are comprised of four books each, and they also have a number of stand-alone "topical" studies such as Esther, Biblical Feasts, and the Resurrection.
We can do one study together as a family. Especially when you homeschool multiple grades, this is key. I have another curriculum that I do like for teaching different aspects of theology and Bible information, but there is a different book for each grade. Next year for the first time, my son will be done with preschool and will be homeschooling as well. He can use the Traceable books while my fourth grader uses Level 2. For next year at least, I can even use the same Teacher Book, with some adjustments (there is a different Teacher book for the Beginner/Traceable Level, but I will probably make do with the one for my daughter's level). One lesson for both of them.
They provide a foundation in the "grammar" of the Bible. If you have been following my blog for long, you know we are a "classical" homeschool family. We believe the best approach for our children is to spend their elementary or "grammar" years building a foundation of basic skills in reading, writing and math, and basic facts in the areas of math, history, geography, science, and language, all of which can be drawn on later in their "dialectic" years (ages 12-13) when they are beginning to make the "why and how" connections among those subject areas, leading eventually to their "rhetoric" years (ages 14-18), when they will take all they know and begin expressing their own knowledge and understanding of it and using that knowledge and understanding to lead and persuade others in the truth. The same is true in their study of the Bible. Right now, they need a foundation in their Bible basics - the major events, people, and ideas of the Scriptures. That is what this series offers.
The teacher guide is user-friendly. Each Teacher Guide covers two levels (levels 1-2 and levels 3-4), which helps to keep the costs down. The teacher/parent is given exact instructions, including how to do the stick figures (honest, so easy that any non-artist can do them) and what information to share. Yes, you need to look ahead and do your own advance planning and praying, but most of the work is already done for you.
The format is flexible. Grapevine offers both traditional paper books and e-books, depending on your needs. The e-books are less expensive. You need to print them yourself, but are allowed to make as many copies as you need for your family or classroom setting (classes receive a one-year license, families can use them indefinitely). Paper copies are a bit more, but you don't have the costs and hassle of printing them yourself and they come three-hole punched for a binder. You can also choose to do a daily lesson or weekly, whichever fits best in your family schedule, which makes it ideal for both homeschooling families looking for daily lessons or families who want to include Bible learning alongside a traditional school schedule.