Development physics representational fluency instrument test of electrostatic concept

Physics representational fluency instrument test of electrostatic concept have been developed. The instrument’s form of multiple-choice that consist of 20 item electrostatic in physics context to assess pre-service physics teachers’ representational fluency. The test includes four component of representational fluency: constructing single representation, constructing multiple representation, translating between representation and reviewing single representation. Representational fluency test is developed using Design and Development Research (DDR) method with four phases consists of analysis, design, development, and evaluation. Validation the structure of the test is consulted with a member of expert academic staff in the field of physics education. After design test and expert review, the test was implemented with 57 pre-service physics teacher. From 20 item of representational fluency test there was 15 item of the test is valid and reliable.