Possibly because things such as: https://mathcs.clarku.edu/~djoyce/java/elements/elements.html https://mathcs.clarku.edu/~djoyce/java/elements/elements.htm...

Possibly because things such as: https://mathcs.clarku.edu/~djoyce/java/elements/elements.html https://mathcs.clarku.edu/~djoyce/java/elements/elements.htm... didn't get grandfathered in, but more likely because teachers just search for: https://www.google.com/search?q=handwriting+worksheets https://www.google.com/search?q=handwriting+worksheets and grab the first free result. That said, I would recommend: https://www.handwritingrepair.info/ https://www.handwritingrepair.info/ and https://sites.google.com/view/briem/free-books https://sites.google.com/view/briem/free-books