ACE: The structure of the course offers students ample practice in all four skills and clear grammar explanations. * Convenient teaching/learning blocks provide presentation, practice, production, review, and testing.r work in the ELT classroom. * Explores aspects of the world, science and also shows the different ways in which people live now, and lived in the past. * Controlled language from Begginer to FCE level. * A cassette recording is available to accompany each book.