Short-Term Memory

This is the 1st type of memory. It is called short-term memory because it is forgotten within such  short time. Within less than 30 seconds, the information stored in your short-term is lost. You need to constantly practice remembering what is in your short-term so it can be "decoded" and put into your long-term. I took this as practice makes perfect because if you keep repeating for example a telephone number your told, you will remember it much more. If you don't it will be so easy to forget it.
  Try this: As someone to repeat a 4 digit number like 1-2-5-9. When they get it, which I'm sure they will get unless they have a problem. Then, move on to a 5 digit number, then 6 and etc. When you reach around 8 or 9, people will start to be unable to remember. This is just a scientifically proven fact because of our short-term memory span.
  There is a way to improve this though. It is called "chunking" and makes remembering long digits much easier. For example, when being told a phone number, we say it like 1-847-239-8765. This is much easier than saying 18472398765 because we are dividing it up to 4 different things rather than one whole.