Workshop 2 - Problem Solving

How to start the project	Glossary
How to use tool palette	Exercises
How to create/edit procedures	References
How to run procedures/programs	Frequently Asked Question

How to start the project

Open Micro-Worlds 1.03 from Education Server.

Identify three windows:

• The page: has turtle shape
• The command centre: has text cursor, and
• Tools: contains 8 icons.

Name your project:

• Go to File option on Menu bar
• Select Save Project As
• Type the name of the project and click Save

How to use tool pallete

Put a title onto the page

• Select Text Tool (letter A)
• Click and drag to form text box
• Click in it to get text cursor mode
• Type text

Change the shape of the turtle

• Select Shape Tool (moon face)
• Choose a shape
• Click on the turtle to change it to the new shape

To stamp with the turtle

• Select Stamper Tool (like a fork)
• Click on turtle to stamp
• Drag turtle to new position and click to stamp again.

How to create/edit procedures

On the Procedures page (page icon with 'to') type in procedure with ' to <name>' at head, 'end' at foot. Eg.

• to go
• rt 90
• fd 30
• end
  
  
• to square
• pd
• repeat 4 [go]
• end

How to run procedures/programs

Make sure turtle is in turtle shape

Choose Command Centre (arrow tool), Pages

Type name of procedure

Glossary

forward < nn>	Go forward nn units (fd).
right < dd>	Turn right dd degrees (rt).
left < dd>	Turn left dd degrees (lt).
back < nn>	Go backwards nn units (bk).
pu	Pen up.
pd	Pen down.
pe	Set pen to erase.
cg	Clear graphics on page and point turtle in home position.
setsh < name-or-number>	Set the shape of the turtle (1-60).
setc < name-or-number>	Set the pen colour (colour names preceeded by ", black=9).
setbg < name-or-number>	set the background colour (colour names preceeded by ", black=9).
setsize < number>	Set the size of the turtle (original size=40, max=150).
stamp	Stamp current turtle shape at this location.
forever [< list-to-run]	Repeatly run the commands in the square brackets until Edit -> Stopall.
home	Move the turtle to the centre of the page, pointing up.
repeat < n> [list-to-run]	Repeat the commands in the square brackets n times.

Quotes:

In Turtle Mathland, .."programming computers" is teaching the Turtle a new word.

Exercises

Problems	Example Solutions
1- Square 50 x 50	Solution
2- Square anysize	Solution
3- Equilateral triangle 50	Solution
4- Equilateral triangle anysize	Solution
5- Rectangle 50 x 20	Solution
6- Rectangle anysize	Solution
7- House 70	Solution
8- Street	Solution
9- Circle 50	Solution
10- Circle anysize	Solution
11- Part-circle	Solution
12- Petal	Solution
13- Flower	Solution
14- Place of worship	Solution
15- Town	Solution

References

Papert, Seymour (1980) Mindstorms - Children, Computers and Powerful Ideas, Harvester Press, UK.

Logo Computer Systems Inc (LCSI) (1993) MicroWorlds Reference, LCSI, USA.

Newell, Barry (1988) Turtle confusion: Logo puzzles and riddles,The Curriculum Development Centre, ACT, Australia.

Newell, Barry (1988) Tutles speak mathematics, The Curriculum Development Centre, ACT, Australia.