Leon Slape became the third patron to file for the Houston board of education this week.
Slape, an incumbent, re-filed for one of two three-year vacancies. He joined Stacie Ely, also an incumbent, and Tim Malam as candidates.
Patrons may file when school is in session Dec. 12 through Jan. 16. To be eligible, candidates must be at least 24 years old, resident taxpayers of the district, U.S. citizen and Missouri resident for one year preceding the election.
The election is April 3.