"Worksheets" is a tool for ESL teachers.  It allows you to create online, interactive speaking and listening worksheets.  For example, instead of students completing a dialogue by writing in the words, they can say the words.  They can also listen to and record themselves practicing vocabulary words, can do matching games, multiple choice questions, etc.  "Worksheets" is designed to create practice activities not assessment (quizzes) - just like a workbook page.  Except that you can include audio as well as text!

Sadly, there's no way (that I'm yet aware of) to include images in the worksheets.  So it is probably of most use to intermediate and advanced students who can deal with a fair amount of text, including written instructions.

Click here to see an example!