Make number line draggable handle more discoverable

[catherinecarter]

During interviews, all three students struggled to find the interactive component on the number line (i.e. the scrubber). The following changes are proposed:

1. Remove the color behind each addend and the total (with color, they look interactive). Replace with a transparent white color in case the number is in front of other objects.
2. Have the color appear only when the handle is moved, like in the accordion box in Number Line: Integers
3. Make the scrubber handle larger
4. Make the pink color on the scrubber handle darker

[marlitas]

Have the color appear only when the handle is moved

Do you want the colors to also appear when someone is changing the addends in the Sum Screen? Or changing from one scene to another?

[catherinecarter]

Do you mean when the user adds or subtracts one from either addend? If so, I think it would make the action more clear if the addend being changed had a color appear to show what was happening.

What do you mean changing from one scene to another (on the Sum screen)?

[marlitas]

@catherinecarter changing from one scene to another on the other screens. Sorry that was unclear.

Also...

Make the pink color on the scrubber handle darker

What color would you like to use instead? You should be able to adjust it in the color editor if you want to look at it in real time.