World's Worst Pet - Vocabulary

Category: English / Literacy

Ages: 7-11 11-14
Price: iPhone/iPad - Free

World’s Worst Pet – Vocabulary is an engaging English Language Arts game designed for fourth through eighth graders. This app helps children increase their vocabulary by taking players through an adventure. We love how the narrative grabs the attention of students without sacrificing the academic component. Children are introduced to domain-specific vocabulary words in word lists that are grouped by topic. The high-quality graphics and abundance of levels makes this a go-to app for vocabulary practice.

This app includes over a thousand words divided into multiple levels. Children will interact with each word list by using words in context, making comparisons to antonyms and synonyms and sorting words. Word lists are organized by topic so that students will see groups of domain-specific vocabulary words together. There are writing prompts included within the app that provide an extension activity for students so that they can use these words in context. These Common Core aligned prompts are a great way for children to use these vocabulary words in the real world.

Children will love the engaging user interface of World’s Worst Pet – Vocabulary. Even if they are struggling readers and writers, World’s Worst Pet – Vocabulary provides words for students approaching grade level so they won’t feel frustrated or left out. The definitions and explanations for each word were designed with children in mind to make sure the experience of learning new vocabulary is meaningful and effective for students. Fourth graders will definitely increase their spoken and written vocabulary with this app.


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From the Developer

Help your students build a rich vocabulary of essential words! World’s Worst Pet exposes students to over 1000 Tier Two words at 6 different levels through four engaging games. Aligned to the Common Core, this app provides student-friendly definitions, a playful narrative, a fun reward system and thought-provoking writing prompts!

World’s Worst Pet is part of i-Ready— an award-winning, blended learning program published by Curriculum Associates. Learn more about i-Ready at


World’s Worst Pet is structured to provide repeated exposures to a cluster of conceptually related target words.
• Teaches more than 1000 words across five grade levels, from grades 4 – 8 with content available for students who are working a level behind
• Student-friendly definitions provide clear explanations with rich examples that illustrate how each word is used.
• Engaging narrative and reward system keeps students motivated
• Activities include word context, word sort, synonyms, and antonyms.
• Students see the same word multiple times in a single set of activities.
• Includes Spanish cognates
• Includes immediate feedback
• Uses a real human voice not synthesized robotic speech
• Aligns with Common Core State Standards
• Writing prompts provide an opportunity to use words in types of writing identified by the Common Core


World’s Worst Pet leverages best practices from Reading research
• Targets Tier Two words, selected from research-based lists.
• Also targets domain-specific words, including science and social studies words.
• Teaches words in conceptually related clusters
• Provides clear student-friendly explanations
• Provides multiple exposures and repeated practice across a variety of contexts
• Helps students make multiple connections between words and their experiences.
• Explores word relationships, including synonyms and antonyms
• Includes Spanish cognates such as vehículo for vehicle or numeroso for numerous
• Includes writing prompts focused on the target words in each cluster


World’s Worst Pet develops concepts, skills, and strategies as targeted by the Common Core.
• “The importance of students acquiring a rich and varied vocabulary,” write the authors of the Common Core, “cannot be overstated.”
• Tier Two words are central to understanding complex text, and World’s Worst Pet provides multiple exposures and repeated practice in these words.
• Aligns with vocabulary standards in these sections of the Common Core State Standards:
o Reading Standards for Literature
o Reading Standards for Information Text
o Language Standards: Vocabulary Acquisition and Use

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Learning Outcomes

Key Features

In-App Purchases - No