LetterSchool is another best app to add to your child's collection of letter and number writing experiences. Letter School clearly introduces each letter, sound and numbers 1-9 with an additional 3 levels of interaction that supports your child from tracing over a line to forming the letter all on their own. A variety of animations keep the content fresh. The positive, motivational feedback encourages your child and will keep them wanting to use this app! Check out the lite version to try out some of the content for free.