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ITS’2002 - Biarritz Evaluating and Revising Courses From Web Educational Resources

ITS’2002 - Biarritz Evaluating and Revising Courses From Web Educational Resources. Danièle Hérin Michel Sala Pierre Pompidor LIRMM – Montpellier II University / CNRS 161 rue ada, 34 392 Montpellier cedex 5 {dh, sala, pompidor}@lirmm.fr Phone : 33 4 67 1 85 85 Fax : 04 67 41 85 00.

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ITS’2002 - Biarritz Evaluating and Revising Courses From Web Educational Resources

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  1. ITS’2002 - BiarritzEvaluating and Revising Courses From Web Educational Resources Danièle Hérin Michel Sala Pierre Pompidor LIRMM – Montpellier II University / CNRS 161 rue ada, 34 392 Montpellier cedex 5 {dh, sala, pompidor}@lirmm.fr Phone : 33 4 67 1 85 85 Fax : 04 67 41 85 00

  2. Evaluating and Revising Courses from Web Educational ResourcesSummary • Approach • Classical course construction - Analogy with teachers practices • Conceptual Structures • Global Ontology • Didactic Tool and Local Ontology • Architecture • General Architecture • Curriculum planner • Course composer • Evaluation Methodology • Errors • Teaching Coefficients • Issues and Prospects

  3. Evaluating and Revising Courses from Web Educational ResourcesApproach ( 1 ) • A pragmatic approach : Analogy with classical course construction • To help a teacher to : build, evaluate and revise courses • To reuse existent on-line educational materials • To compose course with best parts of these materials • To check semantic coherence of the built course • even if it come from heterogeneous sources • Propositions • A methodology and an architecture • Annotations of educational materials on the Web • Evaluate composed course • Feedback is revising and improving the course. • A first approach of an evaluation methodology

  4. Evaluating and Revising Courses from Web Educational ResourcesApproach ( 2 ) • Classical Course Construction : Assumptions about teacher practices • Consensual contents of the course • Use of different textbooks • Decomposition in Units • Content planning • Composition of the course • Teaching session • Evaluation of the course : tests on students • Revision : return on steps 2, 3, 4 or 5 And so on until “stabilization” of the course

  5. Evaluating and Revising Courses From Web Educational ResourcesApproach ( 3 ) • Analogy With Classical Course Construction • Consensual contents of the course Global Ontology • Use of different textbooks Didactic Tools / Web Resources • Decomposition in Units Local Ontology • Content planning Curriculum Planner • Composition of the course Course composer • Teaching session Learning Session • Evaluation of the course : tests on students Exams – Tests - Coefficients • Revision : return on steps 2, 3 , 4 or 5 Revision • And so on until “stabilization” of the course

  6. Evaluating and Revising Courses from Web Educational ResourcesConceptual Structures ( 1 ) Global Ontology (GO) • GO • describe consensual knowledge on the course content • is given at the initial step and then revised • Not take in account problems due to heterogeneity of different sources • Contains • Concepts composing a course  Educational Units • Prerequisites represented by precedence constraints • Educational Unit : EU • Composed of information to be taught • Unit is composed or elementary • Elementary unit • indivisible (leaf of the tree) • cannot be interrupted when it started up • identified by a http address

  7. Evaluating and Revising Courses from Web Educational ResourcesConceptual Structures ( 2 ) Global Ontology • Aggregation relationship A Aggregate B C Component Denoted : A { B,C } Unit A is composed of units B and C Know ( A ) imply know ( B and C ) • Aggregation Hierarchie To represent a GO where : • Root = didactic aim of the course • Node = Unit • Link = aggregation relationship betwen 2 Units. • Leaf = Elementary Unit

  8. Evaluating and Revising Courses from Web Educational ResourcesConceptual Structures ( 3 ) - Exemple • Global Ontology on Database Course Database Course Conceptual Manipulation Request Modeling Language Language Entity UML addition deletion update Simple Complex Relationship Requests Requests

  9. Evaluating and Revising Courses from Web Educational ResourcesConceptual Structures ( 4 ) Global Ontology • Analogy with a book Whole bookDatabase Course Chapters Conceptual Manipulation Request Modeling Language Language Paragraphs Entity UML addition deletion update Simple Complex Relationship Requests Requests And so on

  10. Evaluating and Revising Courses from Web Educational ResourcesConceptual Structures ( 5 ) GO - Constraints between Concepts • Precedence Constraints • Unit B is a prerequisite for Unit C B === > C  C can be taught only if B is known • Hierarchy of Precedence Constraints

  11. Evaluating and Revising Courses from Web Educational ResourcesConceptual Structures ( 6 ) Didactic Tool and Local Ontology • A didactic tool  A Local Ontology (LO) • LO is a subset of GO  includes a set of EUs • Local Ontology on DB on http://www.lirmm.fr/~dh/isim/db Database Course Conceptual Request Modeling Language Entity Simple Complex Relationship Requests Requests

  12. Evaluating and Revising Courses from Web Educational ResourcesArchitecture ( 1 ) General Architecture

  13. Evaluating and Revising Courses from Web Educational ResourcesArchitecture ( 2 ) • Curriculum planer • Help teacher to sequence curriculum just by checking its consistency with respect to GO (precedence constraints) • Course composer • Compose the course • Instantiate each EU of curriculum with one LO • Two strategies to choice a EU : • with the higher teaching coefficient • Minimize errors • Minimize errors indicated by the teacher in the course planning phase

  14. Evaluating and Revising Courses from Web Educational ResourcesEvaluation Methodology (1) • To each EU of a LO is associated more information • Classical errors by students • Teaching Coefficients • Classical errors by students • B [er j p ] with j = error and p = % of students • Different types of error • Didactic Tool : EU is bad in LO1 • Wrong sequencing of the curriculum (prerequisites of a EU) • Error propagated between related EUs

  15. Evaluating and Revising Courses from Web Educational ResourcesEvaluation Methodology (2) • Teaching Coefficients • How well the didactic tool teaches the EU • B x average notation x = 80 % • Example LO1 = { A 9 ( B 8 [er1 60%], C 9, D 8 [er2 50%, er3 30%] )

  16. Evaluating and Revising Courses from Web Educational ResourcesIssues and Prospects • LO and Curriculum are subsets of GO • Revise GO • Errors analyze • Using DAML – OIL / OWL XML, ..

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