Many teachers in Asia are often faced with no set curriculum, therefore teaching a subject can be daunting. Here are a few good sites for lesson plans. What many teachers do is download the plans and then adapt them to their own individual needs and resources. There is no need to reinvent the wheel.
The Lesson Plans Page - Over 3,500 FREE Lesson Plans!
The Educator's Reference Desk: Lesson Plans
Lesson Plan, Lesson Plans For K-12 Teachers
LessonPlanZ.com - Lesson Plans & Lesson Plan Resources for Teaching Math, Science, Social Studies, Language Arts, Reading, Writing, Thematic Units, Themes, Classroom Activities - preschool, kindergarten, elementary, middle school, high school