Mr. Thorne’s Subtraction Galaxy is the newest app from Mr. Thorne Productions for all IOS devices, including iPhone, iPod touch, and iPad. Originally focused on phonic and spelling apps, he has since expanded to include math apps as well. His first math app was Mr. Thorne’s Times Table Terra, a multiplication practice app.
Have a look:
For Mr. Thorne’s Subtraction Galaxy, you child can earn rewards by completing subtraction quizzes. He must score 10/10 on all four quizzes in one skill (beginner, first class, world class, and time attack) to earn a galaxy. There are many different skills, including:
- subtracting one (12-1= ??)
- subtracting ten (43-10= ??)
- missing numbers (6= 20- ??)
- find the difference (What is the difference between 8 and 5?)
- sequences (14, 13, 12, 11,??)
- subtracting by half (What is half of 12?)
- word problems (What is 12 less than 20?)
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Even though subtraction is usually considered one operation, there are actually many different skills that must be learned. To be clear, Mr. Thorne’s Subtraction Galaxy is intended to provide practice for children who already understand the process of subtraction as there are no tutorials offered. It provides a number line, but there is no access to a calculator; math teachers are finding that children need to practice regularly without the aid of a calculator to maintain their automaticity for subtraction facts. For parents who are concerned about their child’s ability to do subtraction, this is a much better alternative than flash cards.
Mr. Thorne’s Subtraction Galaxy is available for download via the iTunes App Store - iOS Universal
More Mr. Thorne's Math apps ...
At the time of this review, Mr. Thorne’s Subtraction Galaxy provides a safe, secure environment, with no web connections or access to social media, no ads, and no in-app purchases. Parents can be confident that their child’s privacy is protected when using this app.
Review by Julie Peterson, a speech/language pathologist (SLP) currently working in a school setting, serving children with special needs ages 6-14.
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Disclosure: This review was move up the waiting list priority-services. All opinions expressed are purely that of the author.