•  What new features have been added to this program that did not exist in the last program?

U4Ch1L2_Variables Investigate

Purpose: Students investigate three working examples of apps that make use of variables.

Activity: Level #1: Thermostat App. V.1_  

1. Play with the App! - What does it do?
2.  Based on the Javascript skills that you have recently acquired, try to write the program for how the Blue & Red buttons work with a variable to present the changing temperature. Refer to past lessons for guidance. Write it on the front board.
   •  Answer
    

Activity: Level #2: Thermostat App. V.2_This Activity shows the actual program for the Thermostat App.     

• Students should compare their program to the actual program.
• Half the Groups should study Section 1: Lines 1-12, and the other half Section 1: Lines 14-21.
• Delete the space in between the quotation marks and the letter "F" in line 4. How does this change what is displayed on the screen?
• Present: Match opposite Groups. Have them explain to the other groups what their lines of code do.
• Finally, Rewrite the program so that it changes by 5 degrees each time the button is clicked.

 Activity: Level #3: Thermostat App.

• Students should view the provided Block Program.  
  •  What new features have been added to this program that did not exist in the last program? (converted to celcius and rounded up.)

Activity: Level #4: Thermostat App.    

• This is the same program seen in Level 3, but now you can run it and see if your prediction came true.
• tempF, tempC, tempDisplayF, tempDisplayC  - What are you observing?
• Do This:
  • How does “Math.round” work? Delete it from lines #3, #15 and #28. What happened?
  • Delete the space in between the quotation marks and the letter "F" in line 4. How does this change what is displayed on the screen?

Activity: Level #5: Thermostat App.

• Students should play with the provided Thermostat App. 
• What new features have been added to this program that did not exist in the last program?  (Name required for Log in. Name placed on Screen 2 while using App.)

Activity: Level #6: Thermostat _This is the program for the App. above. 

• Do This:
  
• Investigate the code for this new version of the Thermostat App. What's changed? What's been added?
• What's happening on line 40? Hover over the getText() block in the toolbox to read its documentation.
• On Line 41, what happens when you add an exclamation point "!" to the end of the string stored in username