Teacher2Teacher Q&A #5103

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From: John Lewis Highsmith

To: Teacher2Teacher Public Discussion
Date: 2001070515:13:43
Subject: Re: Re: Re: Another way to grade homework

Just one comment, and it about terminology. One pair of words that is very widely abused is the percent/percentage. In your message you referred to the students determining their own "percentage". They already have their percentage. It is the number for which they recieve credit. The value they are to determine is their percent. Percent problems have 3 components: a percentage, which is a value to be compared to a second value, called the base, as a ratio (percentage/base). Base and percentage have the same units of measure, so the result of the comparison, called percent(%)when multiplied by 100, has no unit of measure. Let' take a concrete example: A given paper is worth 50 points and the student earns 42 points. The base is the 50 points, the percentage is the 42 points, and the result is 84%.

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