Five people have been charged in Texas with organizing and participating in an illegal cheating scheme that certified more than 200 unqualified teachers and helped the plot’s “kingpin” rake in more than $1 million, prosecutors said. In the scheme, people would typically pay $2,500 to have proxies take certification tests for them at two testing centers in Houston. The scandal involved bribing a testing proctor to allow test applicants and their proxies to switch places... Investigators noticed a pattern, they said: Numerous teacher certification candidates who previously failed certification exams would drive from faraway Texas cities to the Houston area...