TEACHING TYNDALL EFFECTS IN COLLOIDAL SYSTEM TO DEAF AND HARD HEARING STUDENTS

This study aimed to teach communication skills based on simple scientific experiments to deaf and hard hearing (DHH) students. DHH is a hearing barrier that causes students to have limited hearing feedback so that students' vocabulary is limited. This is the basis for developing their skills in communicating one event based on simple scientific observations, such as Tyndall effect in the colloidal system. This research method used a single subject approach to DHH junior high school students. Data were obtained using pre-test and post-test analysis. The experimental results showed that giving special teaching and treatment increased the ability of DHH students to get new vocabulary, knowledge, and increase their communication skill. DHH students have no problem in receiving science and technology. The main barrier is the way how to transfer new knowledge such as Tyndall effect in colloidal system to them.