This is a fine app to provide a student with rote practice in prepositions. The free version allows a student to take one test and sample three pages of explanations, but parents will need to pay for the comprehensive overview and to avoid the distracting ads. The navigation is slightly different from the other Grammar Express apps but the type of content is the same, with quizzes and brief explanations. What's nice in this version is that a student can click on a button to see the answer explained while taking the quiz. However, the explanations, quizzes, and quiz answer explanations use challenging vocabulary and sentence structure, so this app will likely require parental support at times. However, the quiz summaries provide detailed feedback on each answer which can be mailed to a parent, and students can choose to go back and review incorrect answers. Also, parents can pre-set the amount of time for the quiz and give the student instant feedback on each answer. This app is all work and no fun, but the full version has a clean design with easily viewed questions and answers. For students who learn best by doing lots of problems and learning from mistakes, this app can be the right choice.

• 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

• Attention
• Shows advertisements
• Promotes purchases or upgrades to students
• Problems or examples are not interesting for the target age range
• Includes long written questions or text that students must be able to read on their own
• Organization
• Problems or examples are not interesting for the target age range
• Includes long written questions or text that students must be able to read on their own
• Reading Basics
• Includes long written questions or text that students must be able to read on their own
• Reading Comprehension
• Includes long written questions or text that students must be able to read on their own
• Reading Fluency
• Includes long written questions or text that students must be able to read on their own
• Visual Discrimination
• Shows advertisements
• Promotes purchases or upgrades to students
• Vocabulary
• Assumes specific knowledge or vocabulary without "look-up" options

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Grammar Express: Prepositions is the complete course in mastering English grammatical preposition. It contains over 68 pages of lessons explaining each Preposition with several examples. You can learn the grammar rules, study the examples and test their understanding by taking quiz. At the end of quiz the user is presented with test summery and explanation for each test question. Grammar Express can help you to improve your understanding of Prepositions and make use of correct preposition. Custom timer setting can assist you to improve response times under exam time constraints. Research suggest that kids and adults learn most quickly when playing learning games with real-time error-feedback. Grammar Express provides learners with an opportunity to improve strategies for grammar success.

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DETAILED TEST RESULTS:
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A summary of the practice test is presented at the end of each test. It shows you the time you took, the score, which questions you answered correctly and where you were wrong. And yes, you can E-MAIL the results.

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RETRY MISSED QUESTIONS:
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You can reattempt the questions you answered incorrectly in practice tests.

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VERY EASY TO USE:
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The slick user interface allows you to choose from possible answers.
You don’t need to press too many buttons or encounter any alert messages.
The app is very interactive and needs minimum user input Innovative use of iPhone’s small screen real estate.
Shake your iPhone/iPod to skip a question.

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FEATURE LIST:
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• Over 68 pages of grammar lessons and rules with over 265 examples.
• Over 500 multiple -choice questions with explanation.
• Choose number of questions you would like in each test.
• Shows test results in HTML format.
• E-mail yourself the test results and track your progress.
• A new module, “Progress Meter” helps you to retry missed questions.
• Choose your own timer settings.
• Shake your iPhone/iPod to skip a question.
• Cool sound effects. (You can turn them off if desired.)
• Special algorithm that randomizes questions every time you take a test.