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Integer Cluster


The following standards have been agreed to for the Integer Cluster:

Ensure input is valid and provide indicated feedback before dealing with the activity specific feedback.

For input do not accept the following: Letters, symbols and decimal numbers
Thus, things like ‘k’ ‘2.0’ and 2/1 do not need to have feedback attached to it.

Invalid entries should generally not count as an error when keeping track of number of attempts.

Invalid input
Feedback
Action
2- or 2+
The <“+” /“-“ > sign is written before the number, re-enter starting with the sign.
Highlight the contents of the input box, require the user to enter a different value.

Make sure +/- signs are in quotes throughout feedback.

+ or -
Enter a number after the <“+”/ “-“> sign.
Place cursor in textbox after the sign
+0 or -0
Zero is neither positive nor negative. Try again.
Highlight the contents of the input box, require the user to enter a different value.
Double signs for example:
+-2, --2, ++2, -+2

An integer has only one sign. Enter an integer.
Highlight the contents of the input box, require the user to enter a different value.
09, -03, +007
Leading zeros are not necessary.
Action should proceed as if they entered 9, -3, or 7. (Replace values where appropriate.)
This is a matter of standard format, not an error.

Anything else strange,
6++
2-+4
2 - 4

Enter a valid integer.
Highlight the contents of the input box, require the user to enter a different value.
+2 versus 2

Treat as if they were the same unless specifically instructed otherwise in the storyboard.

Samples:

Feedback is given as changes are made to the input box. Integer Comparison Tool

Feedback is given after the student hits "Enter". **Activity 5.1.3 Integer Number Lines**
Check out Scene 12.