Thursday, January 21, 2010

Lesson 3: Estimation

I did my third lesson in my addition unit today. My biggest problem with Estimation is the definition of 'estimate'. Everyone I've talked to have defined estimation as an educated 'guess'. To the kids, they learned that a 'guess' really is anything that's out there. A guess cannot be right or wrong. But now they have me in front of them telling them that what they learned isn't exactly right, that there are 'rules' to estimation. There are ways to make estimation more exact, but they're not really easy to explain. However, I did the best that I could. For once, I taught the lesson a lot like it was explained in EnVision math. I put the lesson plan into my own words though (for the TWS!).

The students were able to identify their tens and ones.

Not Well-
I had to redirect them quite a bit.
I didn't have enough time.
The technology did /not/ work.
The students didn't have contact with the technology.

Anyway. I am not satisfied with this lesson, but I'm not sure HOW I could teach it better. Frankly, I'm thinking I'll have to leave this particular subject alone, having introduced it. On the benchmark tests they will simply add the two numbers together to see if they have enough money to buy the object. As they get more sophisticated in their estimation skills they will learn how to estimate better.

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