The Teacher Open House provides free admission for all teachers of any grade level and any subject to the New Mexico Museum of Natural History and Science, Explora, and the Albuquerque Museum. All exhibit halls are open, including special exhibits. DynaTheater and Planetarium shows are available. There are over 50 additional exhibitors of low-cost or no-cost classroom materials available in all four museums. Discounts at all Museum shops plus music, special events, and refreshments. "Trick or Treat" for teachers; bring a bag and fill it with free "goodies."All museums are open and free to teachers during this event.