Indonesia Conference Directory

Deafness is a hearing barrier that causes people who experience it to have limited auditory feedback so that their vocabulary is limited. Deaf students at the junior level get Natural Sciences learning material about light refraction. This is used as a basis for developing their skills in communicating one event based on simple scientific observations. The vocabulary baseline of deaf students related to light refraction was measured, then used as a basis for developing their language of understanding through a simple experiment of refraction of light in a coffee solution with three types of coffee size (0.5 mm, 1 mm and 2 mm). During the experiment 5 deaf students with different IQ classifications (high, average, below average, and low) were asked to observe and write the light refraction process that occurred. The researcher observes and records all activities that occur. At the baseline session all students seemed amazed to observe the effects of the observed events. But they did not write or say anything during the experiment. In the intervention session students began to be stimulated with a number of scientific questions, the results of their ability to analyze the effects of light refraction, the ability to write reports, and their verbal abilities seemed to increase.