## Series Circuit - ∆V=I•R Calculations - About the Health Rating

Every time a Difficulty Level is completed, a Health Bar and Health Percent is displayed on the screen. And the same Health Bar and Health Percent is displayed on the Main Menu screen for any Difficulty Level that is completed. Students and Teachers may be interested in how this information is computed. Here's the details:

The Concept Builder keeps track of the number of misses each time you do one of the Difficulty Levels. A miss is considered any value that is entered into a cell and evaluated as incorrect. If a cell value is incorrect on the first attempt and not changed, then it would be marked as a miss on the second attempt. If you do not wish to check that incorrect value again, then you would have to remove the value (tap on the cell to open the Number Pad and tap on the C​ or Clear button)  before the next time that your check your answers. The number of misses continues to be tracked until the table is accurately completed. Then The Health Percent value is calculated using the following formulas:

Apprentice Difficulty Level:  Health Percent = 100 - 3*Number of Misses

Master Difficulty Level:  Health Percent = 100 - 2*Number of Misses

Wizard Difficulty Level:  Health Percent = 100 - 2*Number of Misses

Your Health Percent is displayed on the Main Menu. If you wish to repeat the Difficulty Level to improve your Health Percent, you can tap on the provided button to do so. Your best Health Percent is always displayed on the Main Menu. If you repeat a difficulty level and do worse the second time, it is the best Percent that will be displayed.