A retired Missouri businessman has put an additional $100,000 into a potential ballot initiative limiting teacher contracts and requiring schools to use a performance-based evaluation system for staff.
Online campaign finance reports show Rex Sinquefield contributed the money last week to TeachGreat, which is sponsoring the initiative for the proposed constitutional amendment.
Sinquefield also gave $75,000 to the group in March 2012, not long after it was formed.
The group is proposing a 2014 ballot initiative that would limit teacher contracts to three years. It also would require evaluations to be based largely on student performance data.
Several Missouri school officials have filed a lawsuit challenging the summary and cost estimate of the proposed amendment to the state Constitution.