The aim of this study was to investigate the Effects of Visual Aids on Enhancing Teaching and Learning Process in Public Secondary Schools in Ilemela Municipality, Tanzania. The study was guided by four specific objectives; to describe visual aids used by teachers during teaching and learning process, to find out the views of teachers and students about the effects of using visual aids in teaching and learning process, to determine the extent to which teachers use visual aids during teaching and learning process, and to describe the attitudes of teachers and students regarding the use of visual aids in teaching and learning process. The study was guided by Instructional Theory by Skinner (1974). A mixed research approach was employed under which the convergent parallel research design was used. A sample size of 111 participants were selected including students, teachers, school academic masters, heads of schools and school quality assurance officers were involved in order to provide required information. Data were collected through questionnaires and interview guide. The quantitative data was analysed through SPSS version 20 and qualitative data was analysed through thematic analysis. The findings showed that teachers had the tendency of ignoring the uses of visual aids in teaching and learning process. This study concluded that the use of visual aids in teaching and learning process is very important because it simplifies the teaching and learning process. It is recommended that MoEST should provide enough materials for preparing visual aids, to provide seminars and training to teachers for preparation and usage of visual aids.