Anonymous wrote:Betsy-Tacy Series
Yes! There are two groupings of these books- the first few introduce the girls as five year olds and follow them through elementary school. These are appropriate for younger kids and the difficulty and maturity levels increase as the kids get older. Then, there's a little break and then the books start with the girls beginning high school, with a book for each year. Then there are, I think, two or three more following Betsy after she graduates, goes to college, travels to Europe, and eventually marries.
The Betsy-Tacy series is so, so good! Twelve is a great age to start the older series because it's like a view into growing up, albeit in a different time. I would suggest reading the younger series first, even though they are childish, just to get the background on the girls and their families and friends.