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:

04.9 A+B/A-B, resolver para x (10)  

EngiMath Project

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Mètodes de raonament i demostració. Demostració per inducció.

M. Rosa Estela

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19.03 Võrdsed read(10)

EngiMath

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Total number of OERs published so far:

3621

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

Title

Teste de evaluare pentru Lectia 26: Rezolvarea SLE folosind metoda de eliminare Gauss AQ 26.2 (mediu)

Authors

EngiMath

Educational level

Higher Education

Level

medium

Description

Teste de evaluare pentru Lectia 26: Rezolvarea SLE folosind metoda de eliminare Gauss AQ 26.2 (mediu)

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

matrices, XML, tests, Romanian

Tags

EngiMath, matrices, XML, Moodle, Romanian

File
ENG-362-XML-RO.zip

Details

Updated: April 15, 2025 at 1:36 pm



Average rating

Title

Teste de evaluare pentru Lectia 26: Rezolvarea SLE folosind metoda de eliminare Gauss AQ 26.3 (dificil)

Authors

EngiMath

Educational level

Higher Education

Level

medium

Description

Teste de evaluare pentru Lectia 26: Rezolvarea SLE folosind metoda de eliminare Gauss AQ 26.3 (dificil)

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

matrices, XML, tests, Romanian

Tags

EngiMath, matrices, XML, Moodle, Romanian

File
ENG-363-XML-RO.zip

Details

Updated: April 15, 2025 at 1:36 pm



Average rating

Title

16.01 Write Smallest M_{ij} of element a_{ij} 2×2 (10)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

Group of Questions for Moodle on Matrices – Introduction, XML format
– ALL questions have feedback with STEP-by-STEP resolution. Note: It requires a Moodle platform to be inserted into the question bank and, eventually, a specific plugin/software may be necessary for its operation.

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

Determinant, Minor Complementary

Tags

EngiMath, Gate2Math

File
ENG-203-XML-EN.zip

Details

Updated: April 15, 2025 at 12:35 pm



Average rating

Title

16.02 Write Smallest M_{ij} of element a_{ij} 3×3 (10)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

Group of Questions for Moodle on Matrices – Introduction, XML format
– ALL questions have feedback with STEP-by-STEP resolution. Note: It requires a Moodle platform to be inserted into the question bank and, eventually, a specific plugin/software may be necessary for its operation.

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

Determinant, Minor Complementary

Tags

EngiMath, Gate2Math

File
ENG-204-XML-EN.zip

Details

Updated: April 15, 2025 at 12:35 pm



Average rating

Title

16.03 Calculate smallest M_{ij}, 3×3 (step-by-step) (10)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

Group of Questions for Moodle on Matrices – Introduction, XML format
– ALL questions have feedback with STEP-by-STEP resolution. Note: It requires a Moodle platform to be inserted into the question bank and, eventually, a specific plugin/software may be necessary for its operation.

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

Determinant, Minor Complementary

Tags

EngiMath, Gate2Math

File
ENG-205-XML-EN-1.zip

Details

Updated: April 15, 2025 at 12:35 pm



Average rating

Title

Curves adjustments

Authors

Xavier Marcote

Educational level

Higher Education

Level

medium

Description

MATLAB code created to calculate distinct adjustments of a set of points in the plane by means of a function. The adjusting functions considered in the code are polynomials, exponential function and/or potential function. The code permits up to three adjustments at the same time, giving in each case the squared error. A suggested exercise is also proposed.

Licence

CC-BY

Type

Scripts

Category

Numerical methods

Keywords

Approximation, Least squares, Mean squared error

Tags

UPC, Gate2Math

File
UPC-019-SCR-EN.zip

Details

Updated: April 20, 2025 at 8:10 pm



Average rating

Title

Tangent plane approximation

Authors

Xavier Marcote

Educational level

Higher Education

Level

medium

Description

GeoGebra file designed to visualise and work with the concept of tangent plane in a given point for a (differentiable) real function of two real variables. The user must entry the function, the selected point, and also a close second point for which the approximate value of the function (using the tangent plane) is given. An activity file is also included. Available at https://www.geogebra.org/m/ypzfudjz

Licence

CC-BY

Type

Applets

Category

Multivariable calculus – Tangent plane. Normal vector

Keywords

Approximation, Tangent plane, Gradient

Tags

UPC, Gate2Math

File
UPC-020-APL-EN.zip

Details

Updated: April 20, 2025 at 8:10 pm



Average rating

Title

Gaussian elimination

Authors

Xavier Marcote

Educational level

Higher Education

Level

medium

Description

The concepts of matrix in row echelon form and of elementary row operation are first recalled, presenting next Gauss elimination method (in terms of the rows of a matrix), for which an algorithm is proposed. An example is used to give an idea of the utilities of Gauss elimination method, and the way all this could be written in terms of the columns of a matrix is discussed. With examples and a quick test (editable pptx).

Licence

CC-BY

Type

Tutorial

Category

Linear algebra – Matrix calculus

Keywords

Elementary operation, Matrix in echelon form, Rank of a matrix

Tags

UPC, Gate2Math

File
UPC-021-TUT-EN.pptx

Details

Updated: April 20, 2025 at 8:10 pm



Average rating

Title

Applications of Gaussian elimination (Part 1)

Authors

Xavier Marcote

Educational level

Higher Education

Level

medium

Description

After recalling the concepts of matrix in echelon form and of elementary operation (for either rows or columns), three basic utilities derived from Gaussian elimination are presented, pointing out in each case if the permitted elementary operations only act on the rows or only act on the columns, or can act on both rows and columns at the same time. These utilities are: rank of a matrix; determinant of a square matrix; basis and implicit equations of a subspace of a finite dimensional real or complex vector space. With examples and a quick test (editable pptx).

Licence

CC-BY

Type

Tutorial

Category

Linear algebra – Matrix calculus

Keywords

Elementary operation, Matrix in echelon form, Rank of a matrix, Determinant of a matrix

Tags

UPC, Gate2Math

File
UPC-022-TUT-EN.pptx

Details

Updated: April 20, 2025 at 8:11 pm



Average rating

Title

Applications of Gaussian elimination (Part 2)

Authors

Xavier Marcote

Educational level

Higher Education

Level

medium

Description

After recalling the concepts of matrix in echelon form and of elementary operation (for either rows or columns), two basic utilities derived from Gaussian elimination are presented, pointing out in each case if the permitted elementary operations only act on the rows or only act on the columns, or can act on both rows and columns at the same time. These utilities are: invertibility of a square matrix and inverse matrix in the invertible case; systems of linear equations. With examples and a quick test (editable pptx).

Licence

CC-BY

Type

Tutorial

Category

Linear algebra – Matrix calculus

Keywords

Elementary operation, Matrix in echelon form, Rank of a matrix, Inverse matrix, Augmented matrix

Tags

UPC, Gate2Math

File
UPC-023-TUT-EN.pptx

Details

Updated: April 20, 2025 at 8:11 pm



Average rating