The Measured Mama- Teaching handwriting. Has a great suggestion about teaching how to write them from easiest to hardest
Handwriting Without Tears Letter Formation Chart - the Occupational Therapists at my school have great results with this program
Curious Firsties: Handwriting: Tall, Small and Fall
5 Effective Ways to Teach Handwriting to Preschoolers ~ Developmentally Appropriate and Playful
Sensory Writing Tray with Alphabet Cards - Teaching Mama
Penmanship: The Art of Teaching Handwriting - Have a handwriting chart handy so that children can learn the properformation of the letters.