Students can not learn only by presentation, we also have to do activities relate to the lessons. Like drawing pictures and playing games can also help students learn. You also have to communicate with students closely and friendly without pressure. We also have to reflect ourselve why they don't understand and how can i explain in different ways . We have to give time to time . Some students are prepare self  study , some are prepare group words and we have to manage for them nicely. Teachers have to observe carefully, some students are even though they have ides or concern , they are not dare to speak out because they worried they will make mistake and other students will make of fun. We don't want to let them behind because they are quiet. To prevent these , when they make mistakes explain careful why it is wrong and it is okay to make mistake. Appreacte when they answer the questions . Later they will able to answer comfortably without worried.