The tutorial contains explanatory text and activities. Each activity will be enclosed in a red box. Be sure that the entire activity is on your screen when you begin it. If necessary, expand the browser window on your computer. Instructions for the activity will sometimes occur in the text preceeding the activity, and will sometimes be part of the activity itself.
Work through the tutorials by reading all of the text and experimenting with each activity. You can work through any or all of the tutorials listed on the Welcome Page. Enjoy!