Well, I haven’t used getty-Dubay….
The Penny Gardner book is a single book for both Basic and Joined Italic. There are lessons – and online videos on youtube. It does a letter, then has words to practice with already learned letters. I think the style is closer to a standard print than Getty-Dubay. then there are quotes in the style. There are lessons on how to do the joins, and quotes setup. And then more quotes in regular type for the student to use.
It seems to be ok, but I don’t know. This doesn’t seem to be a strong area for my kids an I’m not sure what to do in the future.