I like to use the wet, dry, try method from Handwriting Without Tears when practicing letter formation. It’s just another multi-sensory approach to writing. You can either use a small chalkboard for this activity or there is also a really nice app that you can purchase with the same concept. Here is a link that explains the process and discusses the app.
In the pic collage below, my students are using this method for sight word writing practice. 😊