A survey by the School Administrators of South Dakota this spring has found that over 30 percent of teaching positions posted this year remain open.
The group says South Dakota schools usually fill teaching positions by the end of May.
More than 120 out of 151 districts replied to the group's survey.
About half of the 62 open math positions still need to be filled. Executive Director Rob Monson says the shortage extends beyond math and science subjects.
About a third of open English and special education positions are not staffed yet either.
Monson says the best way to improve education is to hire good teachers, but it's now difficult to find enough teachers.
Low teacher pay was sited previously as a barrier to attracting and retaining teachers.
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