The Niña Columbus Day is a bit of an enigma that used to be celebrated throughout all of the Americas. Columbus’s mission and arrival are now thought to have not been as noble an endeavor in the way that indigenous people were…

Where will the eclipse be seen? What if you are not in the path of totality? Total solar eclipse? What is apparent size? How can the moon seem to cover the sun completely? We’ve created a pretty extensive investigation about…

Valentine’s Day is a good excuse to explore parametric equations. First students figure the coordinates of this figure using trigonometric unit triangles. Then they simplify and accelerate this task with either a graphing calculator or with online software like Desmos…

What does looking down at your electronic device do to your breathing? To your muscles? To your spine curvature? To your pain? It can lead to a condition called Text Neck. To learn more about Text Neck and to kick this…

This activity could be used as an introduction to trig ratios. Students figure out the approximate length of the huge branch that I have to fell for safety and firewood. After approximating the branch’s length, they calculate how many logs…