Math Duel provides comprehensive math practice in addition, subtraction, multiplication and division, but this app is likely to be suitable only for the most competitive math students. Students can create a highly customized experience by selecting the operation, the number of terms, the amount of time per question, and the largest possible numerical answer. Once they press go, they answer a quick succession of problems fitting the criteria, all the while the problem timer, the problem-set timer, the accuracy, and the number of questions is being visibly tracked on-screen. There is no negative feedback for incorrect answers, and the shaking of the wrong answer is barely noticeable which could actually cause more difficulties. There are so many numbers and timers on the screen that many students will feel distracted and overwhelmed. It is even more overwhelming in the two-player, split-screen mode with double the distractions. Although this app can provide effective practice with fast facts and mental math with larger numbers, this app has the potential to be more discouraging than helpful. *Note: This app was originally reviewed for iPhone/iPad. Some differences might apply.

• Provides sufficient and varied types of practice problems to maximize understanding and generalization of the targeted skill/concept
• Manufacturer claims alignment with Common Core/Known Standards
• Presents educational concepts accurately
• Explains answers so students can learn from mistakes
• Better for teaching the skill to new or struggling learners
• Better for practicing or refreshing the skill
• Skills are practiced through authentic, meaningful problems (not just rote practice)

• Appropriate for a broad age range to use and enjoy
• Subject matter and problems are relevant, interesting and authentic to students
• Visually appealing to children in the target age range
• Provides virtual rewards or incentives after meeting specified goals or objectives
• Provides a "break activity" between academic problem sets
• Offers ongoing, progressive challenge
• Overall - Enjoyable. Given the option, students would choose this option

• Has a free or trial version
• Provides teaching guidance for adults to support the child and set appropriate goals
• Provides an age-appropriate tutorial/first time users can work independently
• Student should be able to use independently after first use
• Has a multi-player option to foster in-person collaboration or cooperation
• Multiple users can save a profile
• Student graduates to the next level or topic only after meeting a benchmark
• Can play without sound and not distract others
• Students can save work between sessions
• Can effectively understand and monitor student's progress (email report or in product)
• Provides options to play in languages other than English/Good for ELL
• Presents information in multiple formats (voice over, pictures and text, etc.)
• Overall - Easy to use

• Anxiety
• Student cannot spend as much time to calculate and check answers as needed
• Age inappropriate amount of work which could overwhelm or discourage students
• A player's success depends on speed
• Timer cannot be hidden
• Turn or quiz abruptly ends when timer runs out
• Attention
• Age inappropriate amount of work which could overwhelm or discourage students
• Problems or examples are not interesting for the target age range
• Visually distracting with too many pictures, problems or moving objects
• Numerical Fluency
• Student cannot spend as much time to calculate and check answers as needed
• A player's success depends on speed
• Turn or quiz abruptly ends when timer runs out
• Student will need to copy or write multi-digit math problems
• Organization
• Age inappropriate amount of work which could overwhelm or discourage students
• Problems or examples are not interesting for the target age range
• Processing Speed
• Student cannot spend as much time to calculate and check answers as needed
• A player's success depends on speed
• Timer cannot be hidden
• Turn or quiz abruptly ends when timer runs out
• Visual Discrimination
• Words used during activity can be too small or difficult to read
• Visually distracting with too many pictures, problems or moving objects
• Directions are visually difficult to read
• Working Memory
• Student cannot spend as much time to calculate and check answers as needed
• Turn or quiz abruptly ends when timer runs out
• Student will need to copy or write multi-digit math problems