Please note I did not create any of these fonts, they are all from Fontspace, and remember if you plan on using them for commercial purposes, you gotta pay for them.
Dot-to-Dot Tracing Letter Font
Three-Lined-Writing Paper Font (make blank lines by using space bar)
Lined and Dotted Font
Dot-to-Dot Tracing Cursive Font
Those are just some of my favorites. I love absolutely any font by Kimberly Geswein. She does super cute, super classroom friendly fonts.