OSID — Grading Calculation Entities

Grading Calculation

The Grading Calculation OSID defines a service to apply calculations to GradebookColumns.

GradebookColumnCalculations

A GradebookColumnCalculation is an OsidRule that is created on a GradebookColumn to override a manual GradeEntry with a rule. The rule has one or more input GradebookColumns on which to calculate a result for the entries in the target GradebookCol;umn.

GradebookColumnCalculations define several baked-in rules such as averages and standard deviation. More exotic calculations can be done through the attached GradebookColumnCalculationRecord or through an associated reusable Rule.

For example, a Gradebook may have one GradebookColumn for each quiz of four scores. A fifth GradebookColumn can be created to attach a GradebookColumnCalculation to average to four input quiz scores. The sixth GradebookColumn may contain the input final exam scores and the seventh GradebookColumn defined for a custom GradebookColumnCalculation that weights the seventh column by 60% and the fifth column by 40% before averaging them. An eighth GradebookColumn may be created for an alternate GradeSystem (A-F) with an empty GradebookColumnCalculation that takes the final score in the seventh column and transforms it to a letter grade for grading submission at the end of the term.

Gradebook Cataloging

GradebookColumnCalculations are indirectly referenceable through the Gradebook to which the associated GradebookColumn reisdes. GradebookColumnCalculations do not have a complete independent service pattern since they are directly attached to a single GradebookColumn. Reusable calculations are achieved through reusable Rules.

Gradebook Column Calculation

Osid Rule

A GradebookColumnCalculation represents a rule to derive a column baed on one or more other columns.

Inherited elements

Name	Syntax	Many	Description
Identifiable
`id`	id		the `Id`
Extensible
`recordTypes`	type	⋆	the record types available
Browsable
`properties`	Property	⋆	a list of properties
OsidObject
`displayName`	displaytext		the display name
`description`	displaytext		the description
`genusType`	type		the genus type of this object
Operable
`isActive`	boolean		`true` if this operable is active, `false` if it is inactive
`isEnabled`	boolean		`true` if this operable is enabled, `false` if the active status is determined by other rules
`isDisabled`	boolean		`true` if this operable is disabled, `false` if the active status is determined by other rules
`isOperational`	boolean		`true` if this operable is operational, `false` otherwise
OsidRule
`hasRule`	boolean		`true` if an explicit rule is available, `false` otherwise
`ruleId`	id		the rule `Id`
`rule`	Rule		the rule
`conditionRecordTypes`	type	⋆	a list of `OsidCondition` record `Types`

Name	Syntax	Many	Description
`gradebookColumnId`	id		the gradebook column `Id`
`gradebookColumn`	GradebookColumn		the gradebook column
`inputGradebookColumnIds`	id	⋆	the derived column `Ids`
`inputGradebookColumns`	GradebookColumn	⋆	the derived columns
`operation`	CalculationOperation		the calculation operation
`tweakedCenter`	decimal		the tweaked center
`tweakedStandardDeviation`	decimal		the tweaked standard deviation