Five pages on picking an estimate that makes sense, up to 1,000. On page 1 each row starts with a jar of 100 jelly beans; students compare the other jars with it and circle about 200, about 500 or about 900. Page 2 asks eight everyday questions, such as how many pages are in a picture book or how many children ride a school bus, with three choices that are ten times apart. Page 3 has arrows on a 0 to 1,000 number line: circle about 250, 500 or 750, then write the hundred an arrow points to. Page 4 shows boxes of 10 crayons and bags of 100 jelly beans with a few more: students tell whether there are more or fewer than 100 or 500 and circle about how many. On page 5 students pick the best estimate for sheets of 100 stamps, strips of 10 stamps and cards of 100 dots, then circle the reason it makes sense. The first problem in each part is done as an example.
Show a jar or bag of 100 cubes, then a bigger one, and ask about how many it holds: is it 2 jars of 100, 5, or 9? Talk about why some answers are silly: a pizza with 800 slices, a class of 2. On page 2, have students explain their choice to a partner using something they know, like how many children are in their own class.
Ask estimate questions around the house: about how many steps to the mailbox, crackers in a box, or pages in a favorite book? Pick from three choices, like 10, 100 or 1,000, then check the ones you can. Talk about which choices are too small or too big and why.
This pack supports the following Common Core State Standards for Mathematics:
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A 5-page estimating pack for 2nd grade. Compare jars of jelly beans with a jar of 100 to pick about 200, 500 or 900, and choose the estimate that makes sense for everyday questions like pages in a picture book or children on a school bus. Estimate where an arrow points on a 0 to 1,000 number line, count boxes of 10 crayons and bags of 100 jelly beans to tell more or fewer than 100 or 500, and pick an estimate for sheets of stamps and circle why it makes sense. Every page comes in color and in black and white. Answer keys included.
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