Reply to End 2.0 MCPS math curriculum. List complaints about specific problems.

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[quote=Anonymous]Here are some examples of the quality of story problem writing without a published textbook. (Algebra 1, unit 1, topic 3 packet, pp 25-29)

[quote]
Sabrina brings a Hershey’s chocolate bar to her 3rd period math class. She snaps the bar in half and gives one half to her BFF Yarely. Then everyone sees it and wants a piece. Sabrina is good at saying “no” but Yarely is not. She decides to divide her half of the bar in half and give that half to Steven. Then John attacks Steven, wanting half of his piece. Then, Isaiah grabs John’s piece, rips it in half and eats it. How much of the chocolate bar does Isaiah get?

At 11:00 a.m., Sally leaves a serving of yogurt on a table. The number of bacteria in the yogurt at that time is 1. The number of bacteria in Sally’s yogurt increases by a factor of 4 every minute. Three minutes later, at 11:03, Lupe leaves a serving of yogurt on a heater. The number of bacteria in Lupe’s yogurt at that time is 1, but due to the increased temperature, the bacteria increases by a factor of 8 every minute.
At what time will the number of bacteria in each yogurt be the same?

At noon, a computer virus infects 1 kilobyte of a computer’s memory. Every minute thereafter, the number of kilobytes infected triples (is multiplied by three). At twelve minutes after noon, a much worse computer virus infects 1 kilobyte of another computer’s memory. Each minute thereafter, the number of kilobytes infected in that computer is multiplied by nine. When will the number of kilobytes infected be the same in both computers?

You bought two loaves of bread from the grocery store, one rye and one sourdough. When you got home, you realized the sourdough bread had one sq mm of mold on it. You measured to find the mass of mold tripled each day. The rye bread began to grow mold on the fifth day. You measured to find the mass of mold grew by a factor of nine each day. When will the masses of mold be the same on each loaf of bread?
Create a table to display your solution. Solve the word problem using equations to see if you get the same answer.[quote][/quote]

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