The ACM has been on a mission to promote coding in K-12. Their logic makes sense – coding is important to the 21st century economy. Who can argue? Among the limitations noted in the K-12 setting are the lack of graduation credits for CS courses (either math or science) and the lack of preparation for those who do teach existing programming courses.
A recent analysis from the ACM focuses specifically on teacher preparation.
Some states will accept teacher certifications in STEM-related fields like math, educational technology, and business for their CS teachers, while in other states educators who have only basic exposure to CS but are certified to teach business topics may teach computer science.
I wonder. I wonder what the faculty at my institution would think should the CS department be expected to prepare elementary teachers to teach programming. It is an interesting challenge.