21st century skills profile in linear motion topic in one of junior high school in Bandung.

We have developed 21st century skill instruments in form of Android application that contain experiment activity video contained data. 16 multiple choice questions were made in equal numbers on straight-motion topics to gauge students' 21st-century skills based on Esther core et. al. The developed instruments for linear motion topic both for constant velocity and acceleration motion for junior high school students. The instrument has been reviewed by three science education experts. The developed instruments are tested to 44 students in one junior high school in Bandung. We found that in constant velocity motion topic the average 21's century skill is 34% with highest achievement in the collaboration skill (51%) and lowest in creative skill (29%). And in constant acceleration motion the average 21's century skill is 11% with highest achievement in the collaboration skill (44%) and lowest in communication skill (20%). Based on this result we suggest all effort in learning process to enhance 21st century skills for junior high school students [ABSTRACT FROM AUTHOR]