I introduced 'Scratch' today with my grade 3/4 students and decided the best way to begin was to let them explore the website and see what other children have created. They were to look at least five 'Scratch' creations and evaluate them:
What was it about?
What could you do with it?
What did you think of it?
Well, they were really into it and had a great time looking at the great range and variety of creations on the website. They are now all really keen to learn how to use the program.
There are some great resources and 'how to' videos in the support section of the website, but here is a great video to introduce programming with 'Scratch':