This is one of my favorite projects of all time. Students make a tool to measure the angle of elevation from their eyeline and use it to measure the distance or height of things using trigonometry. I would bring students to the banks of the East River on the Brooklyn side and determine the height of the Chrystler building, or the distance to the Empire State. But you can also determine the height of the basketball hoop, the flagpole or the tallest tree on the school grounds. There are a lot