classes:  lecturer. fun teacher, easy to understand, giving many specific examples, vivid instruction, help students learn by themselves.  curriculum. fun teacher, easy to understand, giving many specific examples, vivid instruction, help students learn by themselves.  facility. fun teacher, easy to understand, giving many specific examples, vivid instruction, help students learn by themselves.  general. fun teacher, easy to understand, giving many specific examples, vivid instruction, help students learn by themselves.