Teachers should demonstrate how to insert a backdrop and a sprite. Then the students should do the same.
Teachers should clarify the difference between a backdrop and a sprite. Use the analogy of a stage and the actors in a drama.
Explain about Costumes. We can change the costumes for sprites during Program execution. We can also change the backdrop for the stage during the execution.
Use the label the parts.png file to know about the parts of the Scratch window. The students need not memorize these but the teacher should consistently use the correct names to refer to the various areas of the IDE.
Teachers should use the key words like sprite, backdrop, code/blocks, costume etc.