Interactive
CK-12 Foundation

Linear Pairs: Angles and Lines in a Perspective Drawing

For Students 7th - 12th Standards
Gain some perspective on linear pairs. Aspiring mathematicians adjust the vanishing point on a perspective drawing. They see the effect on linear pairs of angles and answer five challenge questions based on their observations.
Interactive
Annenberg Foundation

Balancing Sources

For Students 6th - 12th Standards
Pupils turn into investigative reporters throughout history to learn what it takes to balance different primary sources on the same topic. They use what they learn to create a narrative based on their own interpretation of a historic...