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Phones and computers contain dangerous metals like lead, cadmium and mercury, which can contaminate the air and water when those products are dumped. It's called electronic waste, or e-waste, and the world produces a lot of it: 20 to 50 million tons a year, according to the UN - enough to load a train that would stretch around the world. The U.S. is by far the world's top producer of e-waste, but much of it ends up elsewhere - specifically, in developing nations like China, India and Nigeria, to which rich countries have been shipping garbage for years.

"You could call it a trashlight, a handy and handsome AA flashlight made out of little more than a soda can and a cereal box (plus a bulb and two AA batteries). Before you say anything, yes, of course you can buy super-cheap penlights like this. But that would be largely missing the point here. This is about making something yourself, something out of nothing. And I guarantee you that if you take the time to do this project, to render literal garbage into an useful everyday tool, you will get the warmest, fuzziest feeling every time you illuminate some dark corner of your world with it."

Introduce your young students to ICT and research skills via a WebQuest on Garbage - which is a growing concern for our planet.

"Five or so years ago when it launched (way back when, in technology terms), Pinterest entered a social media market dominated by text. Quite simply, it brought an unprecedented visual aspect to social media which users enjoyed, though it was a fairly basic platform. Fast forward to today and you'll find a plethora of new features that can make it particularly useful in your classroom. Read More: How to Use Instagram In Your Classroom So how can making boards and pinning photos be a useful tool for teachers? Pinterest offers a number of different options for teachers both for professional development and for student work. Tons of teachers (and other folks, too) are using this tool  - there are countless boards devoted to lesson plans, classroom ideas, and more. There are purportedly around 100 million active users as of December 2015 - and as with many web-based tools, the more people there are contributing to a platform, the better stuff there will be for you to use (even if you have to sort through some garbage to find it!)   To get your wheels churning, we've collected a few of our favorite ideas below."