By changing a blackboard history hasn’t changed for more than 100 years, school lessons also, teachers, students, nor to change school. In hidden vision, hybrid blackboard application "Kocri" was born. There’s a reason called a hybrid blackboard one. Because, it has strong points for both blackboard and electronic one. While writing fluently in chalk and with using a smartphone as remote control, using projector, it projects videos and images on the board instantly. In slogan, "Chalk in a hand, and smartphone in another hand", it’s product to make education and lessons much better than before.