Welcome to the Mathematics OER Smart Library! Our library offers a diverse range of materials—including videos, infographics, games, presentations, animations, and more—covering topics such as algebra, calculus, geometry, statistics, and probability. These resources are available in seven languages: English, Estonian, German, Portuguese, Romanian, Catalan, and Spanish. Additionally, our library includes materials accessible to visually impaired and color-blind individuals. These resources are designed to support educators, students, and researchers in secondary, vocational, and higher education institutions.

Random OERs:

Teste de evaluare pentru Lectia 6: Operații cu matrici – Înmulțirea Matricilor AQ 6.3 Înmulțirea Matricilor (dificil)

EngiMath

OER Preview To the OER

Calcul Diferential și Integral – Test grilă 18

Bocanet Vlad, Serdean Florina

OER Preview To the OER

26.11 Peamised muutujad/Vabad muutujad, WSelect (10)

EngiMath

OER Preview To the OER

Total number of OERs published so far:

3520

To explore and utilize these materials, navigate through our categorized sections or use the search function to find specific OERs of interest.

Title

12. Elementary Operations on the Rows of a Matrix (OEL)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

The Interactive lesson with examples and questions
Note: Requires specific plugin/software to use/view

Licence

CC-BY

Type

Tutorial

Category

Linear algebra – Matrix calculus

Keywords

Elementary operations, Jacob operations, Elementary matrices, EOR

Tags

EngiMath, Gate2Math

File
ENG-038-SCM-EN.zip

Details

Updated: February 1, 2025 at 3:46 pm



Average rating

Title

13. Row reduction of a matrix to echelon form

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

The Interactive lesson with examples and questions
Note: Requires specific plugin/software to use/view

Licence

CC-BY

Type

Tutorial

Category

Linear algebra – Matrix calculus

Keywords

Triangular matrix, Triangularized matrix

Tags

EngiMath, Gate2Math

File
ENG-039-SCM-EN.zip

Details

Updated: February 1, 2025 at 3:46 pm



Average rating

Title

14. Applications of elementary operations – Inverse of a matrix

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

The Interactive lesson with examples and questions
Note: Requires specific plugin/software to use/view

Licence

CC-BY

Type

Tutorial

Category

Linear algebra – Matrix calculus

Keywords

Inverse of a matrix, Elementary operations

Tags

EngiMath, Gate2Math

File
ENG-040-SCM-EN.zip

Details

Updated: February 1, 2025 at 3:47 pm



Average rating

Title

15. Determinants – Introduction

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

The Interactive lesson with examples and questions
Note: Requires specific plugin/software to use/view

Licence

CC-BY

Type

Tutorial

Category

Linear algebra – Matrix calculus

Keywords

Elementary Minors, Cofactors, Algebraic Complements

Tags

EngiMath, Gate2Math

File
ENG-041-SCM-EN.zip

Details

Updated: February 1, 2025 at 3:47 pm



Average rating

Title

17. Determinants – Laplace Expansion (Cofactors)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

The Interactive lesson with examples and questions
Note: Requires specific plugin/software to use/view

Licence

CC-BY

Type

Tutorial

Category

Linear algebra – Matrix calculus

Keywords

Laplace expansion, Higher order determinants

Tags

EngiMath, Gate2Math

File
ENG-043-SCM-EN.zip

Details

Updated: February 1, 2025 at 3:48 pm



Average rating

Title

18. Determinants – Properties 1

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

The Interactive lesson with examples and questions
Note: Requires specific plugin/software to use/view

Licence

CC-BY

Type

Tutorial

Category

Linear algebra – Matrix calculus

Keywords

Exchange of queues, Multiplication of a determinant by a scalar

Tags

EngiMath, Gate2Math

File
ENG-044-SCM-EN.zip

Details

Updated: February 1, 2025 at 3:48 pm



Average rating

Title

19. Determinants – Properties 2 (direct zero)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

The Interactive lesson with examples and questions
Note: Requires specific plugin/software to use/view

Licence

CC-BY

Type

Tutorial

Category

Linear algebra – Matrix calculus

Keywords

Equal queues, Proportional queues, null queues

Tags

EngiMath, Gate2Math

File
ENG-045-SCM-EN.zip

Details

Updated: February 1, 2025 at 3:48 pm



Average rating

Title

20. Determinants – Properties 3

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

The Interactive lesson with examples and questions
Note: Requires specific plugin/software to use/view

Licence

CC-BY

Type

Tutorial

Category

Linear algebra – Matrix calculus

Keywords

Multiplication of determinants, sum of determinants

Tags

EngiMath, Gate2Math

File
ENG-046-SCM-EN.zip

Details

Updated: February 1, 2025 at 3:48 pm



Average rating

Title

21. Determinants – Properties 4

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

The Interactive lesson with examples and questions
Note: Requires specific plugin/software to use/view

Licence

CC-BY

Type

Tutorial

Category

Linear algebra – Matrix calculus

Keywords

Triangular matrix determinant, Inverse determinant

Tags

EngiMath, Gate2Math

File
ENG-047-SCM-EN.zip

Details

Updated: February 1, 2025 at 3:49 pm



Average rating

Title

22. Adjoint Matrix and its relationship with the Inverse Matrix

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

The Interactive lesson with examples and questions
Note: Requires specific plugin/software to use/view

Licence

CC-BY

Type

GIF/Animation

Category

High-school fundamentals

Keywords

Adjoint Matrix, Inverse Matrix

Tags

EngiMath, Gate2Math

File
ENG-048-SCM-EN.zip

Details

Updated: February 1, 2025 at 3:49 pm



Average rating