App of the week: Door 24-Math

By Meris Stansbury
January 13th, 2014

door24Name: Door 24-Math

What is it? Aligned to the Common Core, Door 24 provides targeted practice in the use of basic facts, number sense and algebraic thinking. Students can work through 6 different levels and multiple problem sets as they help fix Victor the robot’s circuits and solve the mystery behind Door 24. Door 24 is part of i-Ready—an award-winning, blended learning online program published by Curriculum Associates. Learn more about i-Ready at

Best for: Grades 4-8.

Price: FREE

Rated: 4+

Requirements: Requires iOS 5.0 or later. Compatible with iPad.


Provides practice in computational fluency across five grade levels, from grades 4 – 8 with content available for students who are working a level behind.
• An engaging narrative and a compelling reward system keep students motivated.
• Multiple sets of problems are presented at increasing levels of difficulty.
• Challenge sets require students to find all possible solutions to expand their problem solving skills.
• Includes scaffolded hints and Math Review screens to help students when they struggle.
• Aligns with Common Core State Standards


About the Author:

Meris Stansbury

Meris Stansbury is the Managing Editor of eCampus News, and was formerly the Associate Editor of eSchool News. Before working at eSchool Media, Meris worked as an assistant editor for The World and I, an online curriculum publication. She graduated cum laude from Kenyon College in 2006 with a BA in English, and enjoys spending way too much time either reading or cooking.