Now available in American English, this best-selling course can be tailored to the needs of various school curricula, from six to eight levels.  Overview Designed to satisfy the needs of young learners at a variety of levels, the Happy series accompanies the cognitive development of children by building upon their expanding world knowledge and ability to work with extended topics and content. With a clear focus on authentic language, movement and songs, the Happy series is suited to all learning styles and ideal for mixed-ability classes.