Blockhead: The Life of Fibonacci

Overview

As a young boy in medieval Italy, Leonardo Fibonacci thought about numbers day and night. He was such a daydreamer that people called him a blockhead.

When Leonardo grew up and traveled the world, he was inspired by the numbers used in different countries. Then he realized that many things in nature, from the number of petals on a flower to the spiral of a nautilus shell, seem to follow a certain pattern. The boy who was once teased for being a...

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Overview

As a young boy in medieval Italy, Leonardo Fibonacci thought about numbers day and night. He was such a daydreamer that people called him a blockhead.

When Leonardo grew up and traveled the world, he was inspired by the numbers used in different countries. Then he realized that many things in nature, from the number of petals on a flower to the spiral of a nautilus shell, seem to follow a certain pattern. The boy who was once teased for being a blockhead had discovered what came to be known as the Fibonacci Sequence!

Blockhead is a 2011 Bank Street - Best Children's Book of the Year.

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Editorial Reviews

Julie Just
…charming and accessible…
—The New York Times
Kirkus Reviews
"You can call me Blockhead, everyone else does." So Leonardo Fibonacci declares in first-person voice in the opening of this picture-book biography. Who was he? Fascinated with numbers as a child, Leonardo grew from a daydreaming boy in medieval Italy to become one of the greatest European mathematicians of the Middle Ages. He found something to count everywhere, but his father wanted him to be a merchant and took him to North Africa to do his accounts. Leonardo learned fractions from the Egyptians, geometry in Greece and Hindu-Arabic numerals from India. He wrote a book that posed his mystifying, multiplying rabbit question. The lively text includes touches of humor; Emperor Frederick called him "one smart cookie." O'Brien's signature illustrations textured with thin lines re-create a medieval setting. The last page lists things to find in the pictures, like a three-leafed clover and spirals, as well as activities that reinforce his concepts. Few people will know this man's name, but the book will be a boon to math teachers, homeschoolers and others piqued by the title. (Picture book/biography. 6-10)
Publishers Weekly
Math lover or not, readers should succumb to the charms of this highly entertaining biography of medieval mathematician Leonardo Fibonacci. “You can call me Blockhead. Everyone else does,” opens the lighthearted narrative. As an adult, he works out a math problem that involves reproducing rabbits and discovers a pattern that repeats itself in nature, which becomes the sequence of numbers that now bears his name. Hence, his obsession is vindicated: “All my life people had called me Blockhead because I daydreamed about numbers. But how could that be bad? Mother Nature loved numbers too!” D'Agnese's colloquial tone (King Frederick II calls Fibonacci a “smart cookie”) lures readers into the story and even invites them to ferret out patterns in the illustrations. Atop dappled backgrounds, O'Brien's delicate swirls and hatch marks echo the mathematical patterns—another graceful connection between math and the real world in which children live. Ages 6-9. (Apr.)
From the Publisher

"Charming and accessible..."—The New York Times Book Review

* "The lively text includes touches of humor; Emperor Frederick called him 'one smart cookie.’ O’Brien’s signature illustrations textured with thin lines re-create a medieval setting."—Kirkus Reviews, starred review
 
"Math lover or not, readers should succumb to the charms of this highly entertaining biography of medieval mathematician Leonardo Fibonacci."—Publishers Weekly
 
"D’Agnese’s introduction to medieval Europe’s greatest mathematician offers both a coherent biographical account—spun, with some invented details, from very sketchy historical records—and the clearest explanation to date for younger readers of the numerical sequence that is found throughout nature and still bears his name."—Booklist

"This lighthearted introduction to Fibonacci’s ideas will inspire young math lovers and perhaps point them toward more scholarly explorations."—School Library Journal

"[An] engaging, kid-friendly look at Fibonacci and his eponymous numerical sequence... The book has some clever tongue-in-cheek humor, and D’Agnese does readers a favor by clearly explaining Fibonacci’s breeding rabbits scenario... Throughout the book, O’Brien’s illustrations are textured with swirls and spirals—a whimsical homage to the man who discovered, as he believed, 'the numbers Mother Nature uses to order the universe.'"—Horn Book

"Young listeners should get the gist of Fibonacci’s work, and they can test their skills at identifying numbers in the Fibonacci sequence by looking for examples tucked throughout the artwork."—Bulletin of the Center for Children’s Books

Children's Literature - Ken Marantz and Sylvia Marantz
Leonardo Fibonacci tells his own story here, beginning with his love of and amazing ability to manage numbers. His constant daydreaming in 12th century Pisa, however, earns him the nickname, "Blockhead." His angry father is determined to make him a merchant. He takes him to northern Africa. There Leonardo, the lover of numbers, discovers the efficiency of the number system of the Arab merchants as opposed to Roman numerals. As he travels on business, he seeks wisdom, learning fractions and geometry. He sets mathematical problems along with a method of solution. With wry humor, Leonardo tells how he solves problems set to him by the Holy Roman Emperor, Frederick II. Back in Pisa, however, he is still considered a blockhead. Despite this, he goes on to uncover "the numbers Mother Nature uses to order the universe," what we now call the Fibonacci Sequence. O'Brien's swirling style of drawing using fine lines to build shapes seems well suited to this story with the spiral as a major factor. Busy scenes in a variety of sizes and arrangements offer cityscapes, sailing ships, and crowd scenes dressed in the fashion of the times along with diagrams of his discovery. Notes offer the facts known about his life, along with a challenge to find examples of Fibonacci numbers in the illustrations. Reviewer: Ken Marantz and Sylvia Marantz
School Library Journal
Gr 2–5—In this presentation of Joseph D'Agnese's book (Holt, 2010), viewers learn about medieval math genius Leonardo Fibonacci. While there really isn't much original source material on Fibonacci, the author weaves what is known into a first-person narrative about a boy who loves math and sees mathematical patterns in nature. John O'Brien's detailed, medieval-flavored illustrations are scanned as Kirby Ward provides the narration. The illustrations are quite clever as canny viewers will notice patterns and swirls that reflect some of Fibonacci's discoveries. Students will learn about the switch from Roman to Arabic numerals, as well as a way to view the Fibonacci sequence using rabbits. Background music reflects the changing locations in the book. An introduction by the author provides useful additional information. This interesting salute to a legendary mathematician might inspire students.—Teresa Bateman. Brigadoon Elementary School, Federal Way, WA
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Product Details

  • ISBN-13: 9784378041261
  • Publisher: Saerashobo/ Tsai Fong Books
  • Publication date: 9/28/2010
  • Language: Japanese
  • Pages: 40

Meet the Author

Joseph D'Agnese is a writer and journalist who lives in the mountains of Western North Carolina. Though he writes about the Middle Ages, he considers himself a Renaissance man.

www.blockheadbook.com

John O'Brien is a frequent contributor to The New Yorker and has illustrated many popular children's books, including Did Dinosaurs Eat Pizza and This is Baseball.

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Reading Group Guide

TEACHERS: Ideas for Classroom Activities

What's a number? Create your own numerals. Numerals are symbols!

Use an abacus. What's easy/hard about it?

Roman vs. Arabic numerals. Ask them to explain via essays, drawing, presentation the pros and cons of each.

Value of Place Value. Write about a trip to a world that doesn't use zero.

Travel distances. Plot Fibonacci's journey from Pisa to Bugia, and other sites.

Ancient number systems. Research numbers from country Fibonacci visited. (Kids especially love working with Egyptian hieroglyphics!)

Explain the rabbits. Using art and words, explain how Fibonacci got 233 or 377.

Name my pattern. Make a pattern, challenge your friends to solve it.

Graph nature. Count petals on flowers, graph it. Young kids can inspect nature: Halve apple to find star.

Following directions. Make a Fibonacci spiral on paper. Write how it works.

Fibonacci Nature Walk. Photograph or draw numbers you see in nature.

Fibonacci Nature Walk II. Photograph or draw spirals you see in nature.

Follow the Sequence. Where else does the Fibonacci sequence appear? There have been many claims that Fibonacci numbers appear in Music, art, architecture, etc. Have your kids learn a little about these theories, and then go out and prove it!

Hold a Fibonacci Fundraiser. Join tax-deductible Fibonacci Giving Project. Details on website. Ask for donations in Fibonacci amounts: $1, $2, $3, $5...

PARENTS: Help Your Child Explore Fibonacci in Nature

1. Visit a garden where they can inspect and count flower petals. If you don't have a garden nearby, buy a few dollars' worth of flowers at a florist and let kids sort them according to Fibonacci numbers.

2. Plant your own Fibonacci Garden. Let kids research which plants display Fibonacci numbers, and decide which you'll start from seed, and which will be bought live and planted. As each plant blossoms, ask kids to make a record of the numbers they see, using either a camera or pencil and paper.

3. Find examples of spirals in their new garden, at the supermarket, in the woods, or at the beach. If you can't visit a beach, visit a shop that sells seashells and buy a bag and let the kids sort them for attributes. Visit a museum or rock shop to inspect fossils displaying spirals.

4. Research Fibonacci's life and times. Look at pictures of the Leaning Tower of Pisa, investigate books on the Middle Ages, and find Pisa and the Algerian city of Bugia (now called "Bejaia") in an atlas. Plan an imaginary trip through the Mediterranean following in the footsteps of Fibonacci.

5. Create your own number patterns and challenge their friends--or you--to crack the code. See how far they can extend the Fibonacci Sequence. (Keep lots of paper handy!)

6. Invent numerals! A numeral such as 1, 2, or 3 are just symbols for a larger concept of a number. The Romans used letters to express numbers. But your kids can easily come up with their own numerals. Let them try.

7. Write "Fibs"--Fibonacci poetry--using the number pattern as a guide. Learn about Fibs here: http://
gottabook.blogspot.com/2006/04/fib.html

8. Research other men and women in the sciences and write and illustrate their own picture books using
Blockhead as model. Let them include an activity page like the one in Blockhead.

9. Older kids can share/teach what they've learned with younger kids.

10. Serve up some Fibonacci apples! (Slice an apple across its belly--not stem to stem--so they can see the five-pointed star in the center!)

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