Description
share = itemPoints/totalAvailable.
Scoring rules combine points, item weights, boundaries and policies for omission, extra credit or missing items. A computed mark is meaningful only under those explicit rules; applying a rule does not establish its fairness or official status.
share = itemPoints/totalAvailable.
When to use this tool
Use Rubric Item Point Share when checking one supplied scoring contribution or policy boundary.
How to use the tool and how it works
- Enter itemPoints, totalAvailable. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read share. Use the output convention below.
Require positive totalAvailable and itemPoints between zero and totalAvailable. share = itemPoints/totalAvailable.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| itemPoints | Item Points | Required. Finite number; minimum 0. |
| totalAvailable | Total Available | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| share | Dimensionless selected contribution divided by the stated total; not percent. | Required. Finite number. |
{
"input": {
"itemPoints": 6,
"totalAvailable": 20
},
"output": {
"share": 0.3
}
}Limitations and assumptions
- Use matching point units. This is a score-weight fraction, not item difficulty, information, fairness or the final learner grade.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use the complete approved rubric and score record for an official outcome, and examine measurement quality separately.
References
Similar or alternative tools
- Rubric Interval Boundary Tie
Return band upper when score > threshold, or when score equals threshold and equalityToUpper is true; otherwise return lower.
- Mastery Threshold Remaining Item Budget
Calculate the correct-item deficit and whether a supplied mastery-count target remains reachable.