Can I ask what age-group you/they are? And it sounds like you had to write joined-up at school. Why would you stop? Isn't it so much faster?
I went to a snooty high school where fountain pens were compulsory (this was the 80s, not the 50s!). But writing was taught joined-up from pencils in infant school, from when you knew your whole alphabet. It never occurred to me to not join. It would have looked like a very small child's writing. Interesting though that has changed.
My wife is a grade school teacher, and disagrees, but I totally think that teaching handwriting is a waste of time. I wasn't anywhere near as fast writing as typing. I would have been much more productive with a laptop in school.
Anyway. I'm rambling now. Thanks for the response! I stand corrected.