Visit Math Cats' String Art for ideas and patterns to make your own string art designs.
Using graph paper and ruler to guide you, design an orb spider web.Research orb spider webs using the spider web and thread link above or the Garden Spider link, which includes a diagram labeling parts of the web.Make a poster or fact sheet on the math of making a spider web.You'll also see photos and step-by-step diagrams showing how an orb web is made. Find interesting math facts about a spider's spinners and the thickness, strength, elasticity, and quantity of its silk at the spider web and thread page.Look for patterns in the ones place digit and the tens place digit. Using a 100 chart, circle each multiple of 8. (The spider leg-counting ideas were shared by Jenny and Chris on the primary elementary chatboard.) (Younger children might use a calculator to help.) Make a chart showing how many legs are on one spider, two spiders, and so on.
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Discuss how to figure out how many spider legs there are on 2 spiders, or 3 spiders, or all of the spiders on the table.Get a lot of plastic spiders, or draw simple spiders on small squares of paper.Are they identical? If not, double-check and revise the lists as needed. Compare the original spiders with those drawn from the lists of ordered pairs of coordinates.See if you can draw each other's spiders by following the list of ordered pairs, without peeking at the original drawings. (Use a symbol to show where the pencil should be lifted between certain points.) Make a list of the ordered pairs of coordinates so the spider can be drawn by connecting the points in sequence.Draw a simple symmetrical spider such that each line segment begins and ends at an intersection.Number these lines, starting from 0 where they intersect. Near the bottom left edge of your graph paper, draw two lines that form an L.Trade papers with a partner and see if you can complete each other's symmetrical spiders. Using graph paper, draw a perfectly symmetrical spider. Are you getting any better at estimating? Are your estimates more accurate for small pumpkins or large ones? Spider Math Whose estimate is closest? What is the difference between the actual circumference and the closest prediction?Īfter measuring the circumference of one pumpkin, make estimates and measure several other pumpkins of different sizes. Measure the circumference with a tape measure.Estimate the circumference of a pumpkin at its widest point.Do the estimates get closer to the actual weight of each pumpkin?
Whose estimate is closest? What is the difference between the actual weight and the closest prediction?Īfter making estimates and weighing one pumpkin, do the same for several other pumpkins of different sizes. Take turns holding a pumpkin and guessing how much it weighs.If you like, wash, lightly salt, and roast the pumpkin seeds.Whose estimate is closest to the actual number? How far off is the best estimate?.Give each group a portion of the seeds to count.Have each small group estimate how many seeds are in the pumpkin. And what do students do when they get home from trick-or-treating? Why, they sort and count their candy before eating it, of course! Pumpkin Math Halloween is a time for math fun as students explore pumpkins, spiders, and webs.
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