Mwadui Lutheran Secondary School is a co-education boarding school. It provides O-level education and Christian discipleship for about 300 students in Form 1 to Form 4.
It is under the direction of the South East of Lake Victoria Diocese (SELVD) of the Evangelical Lutheran Church of Tanzania (ELCT). Previously a government school, it became a Lutheran school in 1996.
The school has partnerships with Global Lutheran Outreach, the Mwangaza Partnership for Education, Health, Family, and Faith, and various congregations of the Lutheran Church-Missouri Synod.