Dear Grade 11, here are a presentation on scarcity and a wrap-up of ch 1
https://drive.google.com/file/d/0Bw6SHhIAZSilVkJBcWEwSDM1VFk/view?usp=sharing
https://drive.google.com/file/d/0Bw6SHhIAZSilV0RYZTlTWFdhT2c/view?usp=sharing
https://drive.google.com/file/d/0Bw6SHhIAZSilVkJBcWEwSDM1VFk/view?usp=sharing
https://drive.google.com/file/d/0Bw6SHhIAZSilV0RYZTlTWFdhT2c/view?usp=sharing
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