What helped me get back to block print after six years of being required to write cursive is a shop/engineering drawing class that required us to use block print for our plates.

Our teacher in that subject taught us how to do block print, paying attention to each and every stroke and in what order we write them. I remember one of our first handful of plates just being the alphabet and some of the often used symbols. That helped us with our penmanship, without shaming anyone who might have had developed bad habits from previous years. Everyone is required to do it, so there's no shame in sucking at it.