Recently a bus of teachers & students from Jawa Tengah visited my school. Initially, the visitors were planned to observe my chemistry class with 5H. But it went out not as planned. Few teachers & students dropped by my chemistry class and stayed with us for a while. At that moment, I was showing a video relating reaction between hydrogen & iodine. The girls were asked to explain the requirement for a chemical reaction. Luckily the lesson went well as planned.