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### Overview

The world is a noisy place, and errors can occur whenever information is stored or transmitted. Error detection techniques add extra parity bits to data to determine when errors have occurred.

This activity is a magic trick which most audiences find intriguing. In the trick the demonstrator is “magically” able to figure which one out of dozens of cards has been turned over, using the same methods that computers use to figure out if an error has occurred in data storage.

## UP:DLCS18.6.19

### Knowledge

Students know:
• how to use time and date stamps to track changes in data gathered over a period of time.

### Skills

Students are able to:
• assess how data can change over time.
• identify how data may look different when gathered from various sources.

### Understanding

Students understand that:
• the source of data and time when data is gather has an effect on results.

## UP:DLCS18.6.20

### Vocabulary

• transfer protocols
• visualization

### Knowledge

Students know:
• different transferring protocols are used for specific purposes depending on the data and storage methods.

### Skills

Students are able to:
• differentiate basic data transferring protocols from another and various methods of storing data.

### Understanding

Students understand that:
• data is compressed and stored in various transferring protocols depending on the purpose.

## UP:DLCS18.6.21

### Vocabulary

• data structures
• decimal
• binary

### Knowledge

Students know:
• how to recognize a binary number system including bits and bytes.

### Skills

Students are able to:
• identify how binary can be used for bit representation in pixels.

### Understanding

Students understand that:
• there are several data structures and methods for classification.

## UP:DLCS18.7.9

### Knowledge

Students know:
• data needs to be shared but not altered.

### Skills

Students are able to:
• identify measures to secure data.

### Understanding

Students understand that:
• data may need to be protected either physically or digitally.

## UP:DLCS18.7.20

• validity

### Knowledge

Students know:

### Skills

Students are able to:
• evaluate a data set to determine if information being presented is appropriate.

### Understanding

Students understand that:
• it is important to be capable of researching a claim for validity and accuracy.

### CR Resource Type

Learning Activity

### Resource Provider

CS Unplugged
Accessibility