Designed to support early readers, Happy Letters focuses on strengthening reading foundations, such as phonological awareness, phonics, concepts of print, vocabulary, and comprehension. It is rigorous enough to foster meaningful growth yet kid-friendly and engaging enough for kindergarteners to use on their own.

While learning, Happy Letters adapts to each student's response to accommodate varying needs, ensuring all learners receive as much practice as necessary to master rudimentary reading skills. Detailed data and statistics help the teacher to make instructional decisions and form needs-based groups if needed.