What are some effective ways to teach a preschooler to learn howtowrite letters and numbers? The apps will puts a bunch ofcolorsdots down in the shape of the letter, and the kids trace thedots,when trace the dot, it will have stars explosive, it’smoreinteresting for kids to learn! Before children can start towriteletters, they need to learn to recognize them and understandthateach letter has its own sound ? Yes, each numbers and letterswillhave three phonics, English, Mandarin and Cantonese.