classes:  lecturer. Teachers need to give more homework materials for students to practice along with adding more useful listening lessons to increase the ability of students to hear and speak English.  curriculum. Teachers need to give more homework materials for students to practice along with adding more useful listening lessons to increase the ability of students to hear and speak English.  facility. Teachers need to give more homework materials for students to practice along with adding more useful listening lessons to increase the ability of students to hear and speak English.  general. Teachers need to give more homework materials for students to practice along with adding more useful listening lessons to increase the ability of students to hear and speak English.