Writing for Edutopia, Andrew Miller of the Buck Institute for Education notes that games, and particularly serious games that teach content, are fast becoming utilized in the classroom. He cites successes that include Minecraft in the elementary classroom to games that teach civics, and curriculum that pairs World of Warcraft with language-arts standards. Miller continues to present the use of games to teach and assess 21st-century skills, including communication, collaboration, and critical thinking and problem solving.