Flexible Grouping Roster

Regroup learners by current assessment score into balanced contiguous skill bands.

Description

Flexible grouping forms contiguous score bands with nearly equal group sizes.

Flexible grouping forms contiguous score bands with nearly equal group sizes. This produces similar-score groups rather than mixing high and low scores.^[1]

Regroup learners by current assessment score into balanced contiguous skill bands.

When to use Flexible Grouping Roster

Use this tool to regroup learners by current assessment score into balanced contiguous skill bands.

Prepare the lesson timeline, roster, observations or assessment labels requested. Use consistent units and exact identifiers, then choose comparison criteria appropriate to the activity.

How to use Flexible Grouping Roster and understand its results

Prepare the lesson timeline, roster, observations or assessment labels requested. Use consistent units and exact identifiers, then choose comparison criteria appropriate to the activity.
Enter studentIds, assessmentScores, groupCount using the field table and calculation rules, then run the tool.
Read groupAssignments, groupSizes. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
studentIds	Student ids	list of string	Required
assessmentScores	Assessment scores	list of number	Required
groupCount	Group count	number	Required

Enter unique exact learners, aligned finite scores and safe-integer group count from one through roster size. Sort ascending score then localeCompare ID; partition consecutively, giving extra seats to earlier groups. Return comma-joined assignments and sizes.

sort by score then ID; size_g=floor(n/groups)+(g<n mod groups)

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
groupAssignments	Group assignments	list of string
groupSizes	Group sizes	list of number

json

{
  "input": {
    "studentIds": [
      "A",
      "B",
      "C",
      "D",
      "E"
    ],
    "assessmentScores": [
      20,
      45,
      50,
      75,
      90
    ],
    "groupCount": 2
  },
  "output": {
    "groupAssignments": [
      "A,B,C",
      "D,E"
    ],
    "groupSizes": [
      3,
      2
    ]
  }
}

Limitations and assumptions

No student preferences, mixed-ability balancing or educational outcome is evaluated. Commas in IDs are not escaped.

Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Readiness Tier Assignments: Assign differentiated activity tiers using current readiness scores. For a complementary task, use Breakout Group Planner: Partition participants into breakout rooms and calculate usable task time.

References

Flexible Grouping Roster — tool.io

Similar or alternative tools

Readiness Tier Assignments
Assign differentiated activity tiers using current readiness scores.
Breakout Group Planner
Partition participants into breakout rooms and calculate usable task time.