A guide on how to accurately measure snowfall Assisted by Ramesh Gautam, left, Sean de Guzman, chief of snow surveys for the California Department of Water Resources, measures the depth of the ...

I discuss a teaching experiment that sought to characterize precalculus students' angle measure understandings. The study's findings indicate that the students initially conceived angle measures in ...

Watch the demonstration video below to learn more about the PARA laser measure which is now available to back by Kickstarter with early bird pledges available from $179 or roughly £137.