pxt-calliope/docs/reference/js/lessons/answering-machine.md
2016-03-25 16:47:20 -07:00

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# answering machine lesson
create an answering machine on the BBC micro:bit #docs
### @video td/videos/answering-machine-0
## Topic
Show String
## Quick Links
* [activity](/microbit/lessons/answering-machine/activity)
* [quiz](/microbit/lessons/answering-machine/quiz)
* [quiz answers](/microbit/lessons/answering-machine/quiz-answers)
* [challenges](/microbit/lessons/answering-machine/challenges)
* [tutorial](/microbit/lessons/answering-machine/tutorial)
## Class
Year 7
## Prior learning / place of lesson in scheme of work
Learn how to creating a message with a **string**, `basic->show string` to write your message. We will be learning how to create a message using simple commands, such as show string and on button pressed.
## Documentation
* **show string** : [read more...](/microbit/reference/basic/show-string)
* **on button pressed** : [read more...](/microbit/reference/input/on-button-pressed)
## Objectives
* learn how to show a string on the LED screen one character at a time
* learn how to use to register an event handler that will execute whenever an input button is pressed
## Progression Pathways / Computational Thinking Framework
#### Algorithms
* Uses diagrams to express solutions.(AB)
* Uses logical reasoning to predict outputs, showing an awareness of inputs (AL)
* Represents solutions using a structured notation (AL) (AB)
#### Programming & Development
* Creates programs that implement algorithms to achieve given goals (AL)
#### Hardware & Processing
* Knows that computers collect data from various input devices, including sensors and application software (AB)
#### Communication Networks
* Demonstrates responsible use of technologies and online services, and knows a range of ways to report concerns (AL)
#### Information Technology
* Collects, organizes, and presents data and information in digital content (AB)
* Makes appropriate improvements to solutions based on feedback received, and can comment on the success of the solution (EV)
* Uses criteria to evaluate the quality of solutions, can identify improvements making some refinements to the solution, and future solutions (EV)
* Evaluates the appropriatness of digital devices, internet services and application software to achieve given goals (EV)
* Recognises ethical issues surrounding the application of information technology beyond school.
Computational Thinking Concept: AB = Abstraction; DE = Decomposition; AL = Algorithmic Thinking; EV = Evaluation; GE = Generalisation
## Activity
* time: 20 min.
* [activity](/microbit/lessons/answering-machine/activity)
* [quiz](/microbit/lessons/answering-machine/quiz)
## Extended Activity
* time: 20 min.
* [challenges](/microbit/lessons/answering-machine/challenges)
## Homework
* Extended Activity: [challenges](/microbit/lessons/answering-machine/challenges)