That was interesting to read. It makes sense, but then it seems to change based off whether you teach upper case vs. lower case and I want to have a method to my madness why I teach both upper and lower case at the same time just depends on the age and ability of the child. The preschool who was teaching this curriculum started with all straight lines and just now are introducing the letter C and just finished I. I'm wondering if anyone else has heard of what order works best?