Time

There are three m's and it is mean, median, and mode. 
Mean is known as average.

To do the mean you add all your numbers up then divide. To divide you check how many numbers are there and that's the number you divide. 

Median, if you have five numbers you make them least to greatest. You choose the number in the middle and that is the median. If you have an even set of numbers you choose the two middle numbers then add it and divide it by two.

Mode, you write the numbers least to greatest. After that you choose the numbers that appear the most.

LI investigate units of time.