Peer Review

Proportion and Slope - Apps on Google Play

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Ease of Use:

Overview:: This app provides a tool for proportion, slope, ratio, angle, and cross multiplication.
Type of Material:: Simulation
Recommended Uses:: This site would be useful for self-guided study/review session, self-paced and individual student practice.
Technical Requirements:: Android 4.1 and up (developed with API 31 - Android 12)
Identify Major Learning Goals:: This app attempts to graphically show what is routinely done with cross multiplication. It focuses on graphically showing the idea of proportion, and the equivalent fractions for solving directly proportional problems. It shows the slope, the ratio, the proportion between two numbers, and allows applying that proportion to other numbers, whether they are greater or less than the initial one.
Target Student Population:: Grade School, Middle School, High School, College General Ed, College Lower Division, College Upper Division, Graduate School, Professional, and Pre-K
Prerequisite Knowledge or Skills:: Elementary Mathematics

Rating:
Strengths:: This site includes some screenshots that show how to work the Apps.
Concerns:: It should include information about what is the purpose of each concept and why it is used for. The users cannot interact with the App because the user needs to pay for it to see how it works.

Rating:
Strengths:: This app is valuable for students, professionals and academics who want to study and review proportion, slope, ratio, angle, and cross multiplication, but they need to pay a low fee.
Concerns:: Identifying learning objectives would be useful to guide the users to better use it.

Rating:
Strengths:: This app has a consistent layout.
Concerns:: To navigate this app, the user needs to pay for it. It does not have instructions for using it.