I made a huge mistake in the first practice, however, the mistake was gone during the second practice. My mistake was we did the game in a group. Students were super noisy and things were getting out of hand. So, in the next practice, instead of doing the game as a group, we then were doing it as a class. So everybody stayed in their seat. Hufft. I also established the rules and concentration callings. I utilized two concentration callings, one silent clap, and hi hello. One silent clap means when I said one silent clap students will clap their hands once and then said ssshhh. Hi hello means when I said hi, students will reply hello. Those callings quite helped me, but still I need to internalize it.