Arcademic Skill Builders is a nonprofit web site that features online educational games offering a new approach to learning basic math, language arts, vocabulary, and thinking skills. Inspired by arcade games and the intense engagement they foster between the game and player, the site’s programs stem from experience, systematic observations, and research in understanding student learning in school and social situations. "These engaging educational games provide focused repetition practice that enables fluency to be achieved more quickly," according to the site. Students can choose to play "private" games, in which others cannot join the game unless they know the password, or "public" games, in which any player from outside can join the game, but there is no contact between outside players and the student. "We do not store the player IDs that the student creates," the site’s creators assure. "It is impossible for anyone outside your class to contact a student while playing the games." The site features game titles such as Word Invasion, Grand Prix Multiplication, and Verb Viper.