CK-12 Foundation
Ck 12: Elem Math: Visually Identifying Quadrilaterals
[Free Registration/Login may be required to access all resource tools.] Cursor down if needed to locate the video "Visually Identifying Quadrilaterals (Trapezoids, Parallelograms, Rectangles, Squares, Rhombi)." Students watch a video and...
CK-12 Foundation
Ck 12: Elem Math: Given the Area Find the Side Length and Perimeter Squares
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on how to find the perimeter and side length of a square when given the area of a square....
CK-12 Foundation
Ck 12: Elem Math: Identifying Vertices Edges and Faces in 3 D Shapes
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on identifying faces, edges and vertices of three dimensional shapes.
CK-12 Foundation
Ck 12: Elem Math: Determining Whether Lines Are Perpendicular
[Free Registration/Login may be required to access all resource tools.] Students watch two videos and attempt practice problems on how to determine if two lines are perpendicular.
CK-12 Foundation
Ck 12: Elem Math: Determining Unknown Angles in Trapezoids
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview and attempt practice problems on finding the missing angles in a trapezoid.
Texas Instruments
Texas Instruments: Trivialization and Dynamisation
This activity will illustrate how classic exercises from elementary vector geometry can be solved using the Computer Algebra System CAS tool.
AAA Math
Aaa Math: Aaa Math Lessons
AAA Math's interactive tutorials and lessons assist students grades K-8 improve their understanding of a wide range of arithmetic topics. Students are provided with immediate feedback as they complete the "Learn," "Practice," and "Play"...
abcteach
Abcteach: Math Posters
[Free Registration/Login Required] Most of the posters on this site are colorful math posters for primary or elementary school. However, there is one math poster that could be used in secondary school geometry class that has the formulas...
University of St. Andrews (UK)
University of St. Andrews: Alcuin of York
This site from the University of St. Andrews provides a biography on Alcuin which discusses his development of the Carolingian minuscule, his time as headmaster at Charlemagne's Palace School, and his elementary texts on arithmetic,...
Curated OER
University of St. Andrews: Alcuin of York
This site from the University of St. Andrews provides a biography on Alcuin which discusses his development of the Carolingian minuscule, his time as headmaster at Charlemagne's Palace School, and his elementary texts on arithmetic,...