Calculator back-to-school sales

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Here's an idea for a class opener using an overhead projector ... or not. Let students practice the meaning of savings and percent saving as you show them each of our slides. Ask them to jot down their notes and calculations for each of the three sales items. Then let them discuss which offer might be their own best choice. Slide1 = Texas Instrument calculator at Target Slide 2 = CATIGA calculator at Walmart more Slide 3 = Casio calculator at Staples