Random Name Selector Pro vs Uncertainty Calculator

A Fun, classroom management tool, designed for Teachers, that will engage and entertain students. Simply create one or more groups (a Class or Group of Students). Add students to those groups. The App will then randomly select students from the highlighted group. All names will be displayed before a name is displayed for a second time. Features: • Call on your students in a different order every time. • If you want to exclude a Student/s from the selection, simply turn them off in the settings screen. This can be particularly useful for any absentees. • You can delete and edit Groups / Group member names easily inside the app. • The number of Students / Groups is limited only by the amount of free space on your device. • Use a FREE Dropbox account to backup and “Sync” your Groups/Group members with your other devices. You can even use the same Groups/Group members in our “Random Team Selector Pro” app (separate purchase). • If you have a lot of Groups/Group Members to define you can even import them from a text or CSV file. • The teacher can determine how many times any single name can be displayed. This avoids the problem of students “switching off” once their name has been selected once. • This is a Universal App for iPhone and iPad. • The Animated Graphics and multiple themes make the whole experience a pleasure and keep things fresh for the students. You can even create your own backgrounds. • Sound effects and background music help make the app more engaging but can also be switched ON/OFF individually as required. • You can apply a “Passcode” to access the settings screen. • Need to know where you are in the selection process. We have added a display option that shows the number of names drawn and the number of names remaining in the particular selection process. • Provide Feedback to the Developers directly from within the App….let us know how we can make it better. • Share with your friends on Facebook or Twitter from within the App. We value your feedback. Many of the features above are the direct result of Teacher feedback. If you have any ideas of ways the app can be improved we would love to hear them. Also, if you want to report a bug please use the “Email Support” button inside the app, or email us directly at support@edtechmonster.com We will always get back to you.

Uncertainty Calculator evaluates the error propagation throughout the mathematical expressions comprised of variables of uncertain value. The application allows input of up to three value-error pairs (A, B and C), that can be used as a parameters in the final expression. Error values should be provided in absolute (100 +/- 5) or in relative format, the latter should appear in percent format (100 +/- 5%). The evaluated expression can include numerous functions, that provided by row of the appropriate buttons. Components and functions can be added directly to the expression field by pressing the corresponding buttons. To encompass expression into the preset formula, select the expression and press the corresponding formula button. Particular attention should be paid to placing brackets to avoid equation ambiguity. The application deals with independent, random errors. So if this is a case never use A + A, but rather 2*A and never A*A*A but rather A^3! Obviously, different parameters can be combined in any way (A+B or C *A^2 .. is perfectly fine). Angles for trigonometric functions can be provided in degrees or radians, and that should be reflected by setting a yellow button to "DEG" or "RAD". Bear in mind the importance of units in any of calculations! Implementation Examples: 1.The charge passing through an electrical circuit is defined by: Q = I * t, where I is the current and t is the time. Calculate the total charge value when a current of 0.15 ± 0.01 A passes through the circuit for 120 ± 1 s: Input: A = 0.15 ± 0.01, B = 120 ± 1 The final expression will be A*B, and press Calculate: The final value will be: 18 ± 1.2 Thus, it can be reported the total charge as 18 C ± 1 C. Important! One should only report as many significant figures as are consistent with estimated error! So the value should be rounded to the rightmost decimal place at which error applies. 2. A ball is tossed straight up into the air with initial speed vo = (4.0± 0.2) m/s. After a time t = (0.60 ± 10%) s, the height of the ball is h = vo*t - 0.5gt^2 = 0.636 m (g = 9.80 m/s^2). What is the value and uncertainty of height? Input: A = vo = 4.0 ± 0.2, and B = t = 0.60 ± 10%, then the final expression should be: A*B – 0.5*9.8*B^2 The final value will be: 0.6 ± 0.4 (meters).