This is an excellent teacher training website that includes 100s of videos on how to teach effectively.  They cover topics like how to teach a task-based lesson, how to give good instructions etc...  They have a few free videos to check out before you subsribe.  The membership includes:

	24/7 availability no matter where you are. A full video library – over 100 videos and counting! Practical how-to instructions on designing activities in the classroom. Lesson planning, teaching, classroom management and employment tips. Live interactive broadcasts with TEFL industry professionals.