Landis, who has been on the board since 2001, was the last remaining board member from the group from those who were in office in April 2013.
The resignation comes on the heels of the resignation of his fellow board member Randy Steele and Superintendent C. J. Huff.
From the Globe article:
"During the past year, it has become increasingly obvious to me that the board is turning in a direction that I feel is not in the best interest of kids of Joplin Schools," he wrote in his letter to the board president. "Political agendas have taken the place of what the focus of the board should be, which is setting policy for the school district."
Landis said in his letter that he has worked with great board members over his 14-year service.
"However, when the members of the board are getting down in the weeds and trying to take the place of administration, then I know it's time to move on," he wrote.