1. Basic Procedures By Phil Bagge HIAS Computing Inspector / Advisor
CAS Community Leader
Author of the code-it resources
Supported by

2. Procedure A set of instructions grouped together to carry out a task
Procedure A set of instructions grouped together to carry out a task. Run a procedure by using its name. Procedures can be run/used lots of times.
Read the text
By Mr Bagge

3. Common everyday procedures that your brain already knows how to do
Walking Getting dressed Eating Breathing Jumping Hopping
Can you think of any more everyday procedures?
Ask your pupils if they can think of any more
(sleeping is a good one)

4. Common everyday procedures that your brain already knows how to do
Define breathe
Breathe in
Wait
Breathe out
wait
Define walk
Move right leg forward
Wait
Move left leg forward
wait
Loop always
breathe
if need to go somewhere
walk
if hungry AND food near
eat
Emphasise that the procedures are started from the algorithm on the right. They can be used over and over again. Read the script on the right and reference the procedures on the left.
Define eat
Put food in hand
Lift hand to mouth
Put food into mouth
Loop until a paste
chew
swallow

5. Procedure stories straight land
What procedures does autopilot been programmed to do?
Think about the landing procedure. How might you order these instructions? (A-E in right order)
Can you think of any other procedures that could be programmed into autopilot?
How many times can the pilot use a procedures?
Autopilot can land the plane and fly straight ahead. You press these buttons to start these.
A) Line up plane with runway
B) Put wheels down
D) Slow down engines
C) Define land
E) Reduce height until wheels touch ground
land
straight
Maybe get pupils to order the landing procedure or do it as a whole class.

6. Procedure stories straight land
What procedures does autopilot been programmed to do?
Land, fly straight
Think about the landing procedure. How might you order these instructions? C&E have to be in those places. D, B & A could be swapped around
Can you think of any other procedures that could be programmed into autopilot? Climb (gain altitude) dive (reduce altitude) take off circle (accept any sensible suggestion)
How many times can the pilot use a procedures?
As many times as they want
Autopilot can land the plane and fly straight ahead. You press these buttons to start these.
C) Define land
A) Line up plane with runway
B) Put wheels down
D) Slow down engines
E) Reduce height until wheels touch ground
land
straight
Go through the answers

7. Misconceptions (for teachers)
Some pupils run the code by directly clicking on the define square block rather than the Square name block This can often mean that they don’t really understand how the procedure works especially if they never intend to use the small blocks that run or call the procedure