Indonesia Conference Directory

This article discusses the development of assessment instruments for the deepening of science materials in accordance with 21st century research. The 21st century is an era trend that requires skills in life skills. Humans are successful in this century if they can keep abreast of developments and be able to adapt ways of thinking with the era. 4Cs become the main skill in building a way of thinking where its existence affects the world of education. Achievement of these competencies can be observed if there are appropriate assessment instruments. Instrument is developed with research and development (R&D) methodology based on 21st century skill indicator analysis through validation from the expert team. The limited scale test and wide scale are used as benchmarks in measuring the validity of the developed institutions.