Enter http://www.htdp.org. Click the HOW TO DESIGN PROGRAM link, then the
DrSCHEME link, then the Download DrScheme link. Select version
At WHS, make sure the platform says: Windows 95/98/NT/2000 x86, standard archive
: Click download. Follow the download link. A File Download window will
appear. Choose 'Open'. When the download is complete, a DrScheme
installation wizard will open into a black and blue screen. Click next.
Select the destination directory. Make sure the destination is as follows:
C:\Program Files\PLT. The computer
will then install the program.
Answer yes to all dialog boxes.
Add a shortcut on the desktop to DrScheme. If you do not know how,
Click on the Icon on the desktop to enter The World of DrScheme.
Take the tour. When you are done you are ready to begin programming.
The (open … close) dance <ask teacher>
ARITHMETIC ACTIVITIES - See the Arithmetic Expression handout in your binder.
NOTE: The interaction window can
be use as a calculator when you need arithmetic to design and plan your
graphics using patterns.
In the interaction window (bottom window)
see if you can write a command to ADD 3 and 4. <Hit
Remember the rule from the "dance" is (operation
data data …).
The basic math operations are:
+ to ADD
- to SUBTRACT
* to MULTIPLY
/ to DIVIDE
=, >, < are the relational operators
to compare numbers.
Using the handout for ideas, try some more
To learn more go to: www.knorth.info MATH Link.
ENHANCEMENT 1: Write functions for
F(X) = X + 5, as well as others (ask
ENHANCEMENT 2: Play Ping-Pong.
Go to Language / Add TeachPack/ Open Htdp
folder, select pingp-play.ss
In the definition window (top) type (go 'Programmer)
and click the execute button.
You will see a canvas pop up. Follow
directions to play Ping-Pong.
To make the game more interesting you can
change the speed and the vector of the ball. Change the parameter
that is a number to see what happens. Use the following code.
The function calls to change-speed and change-wind must be written before
the command go. Type the following in the top definition window, they click
| (change-speed 400)