Fractions in Disguise
A Math Adventure
Charlesbridge 2014
Great fit for 3rd grade
Reading level and content both target K–3rd grade · ages 5–9
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Genre
Themes
- problem-solving
- math literacy
- ingenuity
- perseverance
- honesty vs. deception
- curiosity
- mystery
- critical thinking
About this book
When a prized fraction vanishes at an auction, young sleuth George Cornelius Factor (G.C.F.) chases a cunning villain who hides numbers in clever disguises. With his invention, the Reducer, G.C.F. shows how simplifying fractions reveals their true identities. Lively wordplay, comic action, and clear math moments make this a fun way to introduce reducing fractions. Great for early elementary readers and families looking to make math feel like an adventure.
Setting: a whimsical contemporary city—auction house, inventor’s lab, and city streets
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Frequently Asked Questions
Is Fractions in Disguise right for my child?
Yes — Fractions in Disguise is a great fit for 3rd grade. The reading level is AR 3.6, which is typical for 3rd grade. The interest level is rated Lower Grades (K–3), meaning the themes and content are designed for ages 5–9 (K–3rd grade). Themes include problem-solving, math literacy, ingenuity.
How long does it take to read Fractions in Disguise?
At a typical 3rd grade reading pace, Fractions in Disguise takes around 8m to finish. The book has 1,100 words. Slower or faster readers may vary significantly.
Does Fractions in Disguise have an AR quiz?
Yes — Fractions in Disguise has an AR quiz available, worth 0.5 points. Your child will need to take and pass the quiz through their school's Accelerated Reader program to earn credit. The quiz is typically 5–20 multiple choice questions about plot, characters, and setting.
What grade level is Fractions in Disguise?
Fractions in Disguise has an AR reading level of 3.6, which places it at a 3rd grade reading difficulty. The interest level is rated Lower Grades (K–3) — this reflects the age-appropriateness of the content and themes, not just the reading difficulty. A strong younger reader may handle the words fine while the themes are aimed at an older audience, or vice versa.