A balanced approach to science in each level "Glencoe Science: Level Red" is the first book in Glencoe's three-book integrated science series. "Level Red" provides students with accurate and comprehensive coverage of life, earth, and physical science. The strong content coverage integrates a wide range of hands-on experiences, critical-thinking opportunities, and real-world applications.A balanced approach to science in each level "Glencoe Science: Level Red" is the first book in Glencoe's three-book integrated science series. "Level Red" provides students with accurate and comprehensive coverage of life, earth, and physical science. The strong content coverage integrates a wide range of hands-on experiences, critical-thinking opportunities, and real-world applications.