The teacher shortage is not unique to Indiana. Shortages are being reported in states across the country, including California, where these reforms do not exist (new CA teachers are down 53%).
Education reform has improved education in Indiana. Since these reforms were passed in 2011, student achievement has improved by every measure. Higher ISTEP and IREAD3 scores, higher graduation rates, more students taking and passing AP exams and ECAs. Since these reforms Indiana has increased its number of A schools and decreased it's number of F schools.
Education reform is not the cause of Indiana's teacher shortage.