Metric TimeThe day is divided into 100 parts (centidays) and the time is given to three decimal places. Think of it as a percent of the day that has passed. Midday will be 50.000 LMT (Local Metric Time) in metric Time. 
How many full hours are left until the end of the year?? 
Mayan Time
The Mayans used a vigesimal (or base20) numeral system. Mayan numerals use only combinations of dots (ones) and bars (fives) to form numerals for 1 to 19, and a stylised shell glyph for zero (not shown here). 

Hexadecimal TimeThe day is divided up into 65536 parts and written in hexadecimal (base16) notation (A=10, B=11 ... F=15). The "0x" at the begining is just to signify that it is in hexadecimal notation, we could just leave it off or use some other signifier. 


Binary TimeLike hexadecimal time, the day is divided into 65536 parts, only we display it as a binary number using squares for bits, here using dark squares to represent 1 and white for 0. 
Octal TimeOctal Time uses a base8 system (digits 07). The day is divided into 32768 parts for a total of 5 octal digits. The rightmost digit updates about every 2.6 seconds (half the speed of hexidecimal time). 
Base 64 TimeBase64 uses ASCII characters (in ascending order: AZ, az, 01, +, and /). Can you figure out how you would convert Base 64 time to mormal time? 
The many digital clocks used on this page are adapted from the work of Lyle Zapato
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Casio Classwiz CalculatorThere is currently a lot of talk about this new calculator being the best in its price range for use in the Maths classroom. The new ClassWiz features a highresolution display making it easier to view numerical formulas and symbols but it isn't a graphical calculator as such (it has the capacity to draw graphs on your smart phone or tablet, via a scannable QR code and an app). As well as basic spreadsheet mode and an equation solving feature you also get the ability to solve quadratic, cubic or quartic polynomial inequalities and the answer is given just as it should be written down, using the correct inequality symbols! This calculator has a highperformance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more... 
Teacher, do your students have
access to computers? 

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