I strongly believe that my input and worksheets that I have given to students were enough for them. Actually, I have given the knowledge about the operating system, gave them an example before I go through the exercise part. Therefore, after they have understood the topic of the day lesson, then, they can do their works which I have given them five higher order thinking skill for them to complete it. That is the way to see students’ understanding of the lesson. On the other hand, there are some weaknesses of my teaching which are insufficient materials and controlling the class. Some part of my lesson was boring because I don’t have much of the creativity to make students focuses. Other than that, sometimes I could not control the class. When I doing teaching them, some people was talking with their friends and some of them were looking at their phone. Those are my strengths and weaknesses that I have faced in the class. However, I considered my English proficiency at the intermediate level. I need to study hard and learn more of English. I can see from my teaching itself that sometimes I still have faced with the problem and lack of vocabulary. Therefore, I need to be more practice and improve my English proficiency.