School math, multimedia, and technology tutorials.
The clock below is called the Sheldon Cooper’s clock (I searched for it at Amazon, but the best that I could get is this math clock). If this clock exists, I really want to buy one.
I am also confused with 0b. Is it a hexadecimal number or a Greek number? In hexadecimal, B stands for 11, and in the Greek system, according to one of the comments in the clock’s website, 0 which is actually 
What do you think?
Archimedean is great geometric tool I discovered recently via the Facebook page of GeoGebra. It is a tool for exploring polyhedral shapes. It is capable of transforming (e.g. truncating the solid’s corners or edges), and analyzing (e.g. showing the lines of symmetry or inscribed radius). Archimedean also allows the user to change the colors and other propoerties of the investigated solids.
Archimedean was created by Raffi J. Kasparian. It is very similar to Poly, another software for investigating solids.
