Horrible Harry and the Green Slime
by Suzy Kline
Penguin 1998
Great fit for 3rd grade
Reading level and content both target K–3rd grade · ages 5–9
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Genre
Themes
- friendship
- school life
- pranks and mischief
- creativity
- teamwork
- problem-solving
- humor
About this book
In this early chapter book, classroom jokester Horrible Harry cooks up gooey green slime, hatches spooky plans with cobwebs, and puts on a dramatic skit that has Room 2B buzzing. Told with lots of humor and everyday school details, it captures the ups and downs of second-grade life. Short chapters, friendly illustrations, and familiar situations make it a fun pick for newly independent readers. Kids enjoy Harry’s mischievous spirit, the tight-knit friendships, and the laugh-out-loud school antics.
Setting: Room 2B in an elementary school, present day
Frequently Asked Questions
Is Horrible Harry and the Green Slime right for my child?
Yes — Horrible Harry and the Green Slime is a great fit for 3rd grade. The reading level is AR 3, 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 friendship, school life, pranks and mischief.
How long does it take to read Horrible Harry and the Green Slime?
At a typical 3rd grade reading pace, Horrible Harry and the Green Slime takes around 48m to finish. The book has 6,500 words. Slower or faster readers may vary significantly.
Does Horrible Harry and the Green Slime have an AR quiz?
Yes — Horrible Harry and the Green Slime has an AR quiz available, worth 1 point. 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 Horrible Harry and the Green Slime?
Horrible Harry and the Green Slime has an AR reading level of 3, 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.