BELLA student model: about 150 tuples covering Common Core concepts, skills, bugs and missing heuristics, each scored 0–100 with full change history

Design · All designs
Evidence · no claims cited

Description

BELLA models each student's domain knowledge as a set of about 150 tuples, each corresponding to a Common Core concept, skill, or specific type of bug or missing heuristic. Each element is summarized as a number from 0 to 100, and BELLA stores the entire history of every model element — every action or inaction that caused the number to change. The teacher can drill down through a UI to see the exact historical in-game events that caused each revision. The authors estimate the model will grow to about 200 tuples when the sixth-grade Common Core curriculum is fully covered.

Design Implications

Context

Requirements

• Model initialization method not yet settled: options include pretesting, a normative 6th-grade model, interviewing the teacher or student, or starting with a very incompetent Elle

Constraints

• The authors hypothesize but have not tested that this set of about 150 elements suffices for the BELLA task

Target Learners

• Sixth-grade mathematics students

Learning Goals

• Diagnosing and tracking specific Common Core concepts, skills, bugs and heuristics in pre-algebra

Claims

Related Designs

• Bella Simulated Lbt Architecture

Examples

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Key Sources

• Lenat, D. B., & Durlach, P. J. (2014). Reinforcing Math Knowledge by Immersing Students in a Simulated Learning-By-Teaching Experience. Int J Artif Intell Educ. https://doi.org/10.1007/s40593-014-0016-x

Page metadata

Field	Value
type	design
id	bella-student-model-150-tuples
title	BELLA student model: about 150 tuples covering Common Core concepts, skills, bugs and missing heuristics, each scored 0–100 with full change history
description	BELLA models each student's domain knowledge as a set of about 150 tuples, each corresponding to a Common Core concept, skill, or specific type of bug or missing heuristic.
status	review
generated	by process:settle-candidates on 2026-10-28
trust	unverified — no one has confirmed this page's content
sources	1 — lenat-2014

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