• Lesson Plan | Will It Happen Again? Examining Mass Extinctions on Earth
  Overview | What is a mass extinction, and why do some scientists think human beings may be responsible for the next one? What do we know about the past extinctions, including their likely causes? In this lesson, students learn about mass extinctions, map extinction events to a geologic timeline, and explore current ideas about whether human influences may lead to another major extinction event.
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• Ten Ways to ‘Go Green’ and Mark Earth Day
  The Learning Network Blog - NYTimes.com
  in Public bookmarks with earth_day lesson_plans nytimes

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