Teacher in Space Project to interested teachers while 11,000 teachers sent completed applications to NASA. Each application included a potential lesson that would be taught from space while on the Space Shuttle. The applications were sorted and then sent to the various State Departments of Education, who were then responsible for narrowing down their state applicants to a final set of two each. These applicants were notified of their selections and were gathered together for further selection processes down to ten finalists. These were then trained for a time, and in 1985 NASA selected Christa McAuliffe to be the first teacher in space, with
Christa McAuliffe to investigate the disaster. It determined that the accident was due to a failure of rubber O-rings made by Morton-Thiokol that provided a pressure seal in the aft field joint of the shuttle's right Solid Rocket Booster. The failure of the O-rings was attributed to a design flaw, as their performance could be too easily compromised by factors that included the low temperature on the day of launch. The Commission found that O-ring resiliency is directly related to temperature and due to the low temperature at launch—36 degrees Fahrenheit or 15 degrees lower than the next coldest previous launch—it was