According Busy Teacher...
«Most teachers agree that homework assignments are an absolute must in an ESL course. But ESL students, on the other hand, may disagree. Adult learners will argue that they have busy schedules and a life outside the classroom, which translates into “no time for homework”. Young learners and teens may come to terms with the fact that they have to do homework, but do we want them to do it because they are compelled to do it... or do we want them to do it because they are excited to do it? Which would you prefer? The only way to get young students excited about doing homework, and get adults to set aside some time for it, is through highly creative and thoroughly engaging homework assignments. And here are 5 examples: (1) A Word Book (2) Do My Research (3) In the News (4) Email Writing (5) Watch It

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Another great way to get students actively engaged in their homework assignments is to ask them to come up with some ideas for creative assignments on their own and share them with the class.»
Read more @5 Most Creative Homework Assignments
(abridged and adapted)