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Mr. Khan explains with pictures and diagrams Carl Linneaus' taxonomy system and the biological tree of life. He mentions that the debate still continues regarding how to classify organisms and that newer technology that examines DNA is helping to make relationships more clear. A few corrections in what Mr. Khan says pop up as he speaks. Using humans as an example, he works his way up the nomenclature hierarchy.
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Pros
- Different colors of ink and color pictures make the diagrams more visually appealing
- Mr. Khan speaks in a casual, friendly tone for middle and high schoolers
Cons
- The flow of this lesson is a little difficult to follow; if students watch it on their own, they can back up and review information as needed for clarificaiton