Cat’s Eye: Reflective Road Marker

Cat’s Eye: Reflective Road Marker "The Cat’s Eye invented in 1933 features reflective glass spheres set inside a rubber and cast-iron housing. Each unit is complex and dynamic, its various materials engineered to serve a variety of clever functions. The metal part of the housing protects the device while creating an audible sound when a car passes over, like Botts’ Dots. Meanwhile, a fixed rubber wiper clears off the glass when it is pushed under the road. The Cat’s Eye is also retroflective, meaning: it redirects light back toward its source with minimum scattering, optimizing visibility for cars in motion." … Continue reading Cat’s Eye: Reflective Road Marker

How Important Is The First CS Course?

This is a good read. We will be working with the kids on using Scratch in the coming weeks. With filtering and Flash, we only have one laptop that can be used, so there will have to be a lot of cooperation and collaboration. Stay tuned… from… How Important Is The First CS Course? In the case of computer science there are lots of fun and interesting things to teach and ways to teach them. You can use block languages like Scratch, Kodu and Alice (see lots more at block programming languages) for example. You can use turtle graphics in … Continue reading How Important Is The First CS Course?