6.7 Shape Maker Day 1

Ask user to input the "number of sides" of a shape, and then create that shape!

Use make-a-block with parameter "number of sides" to create a shape that the the user asked for.

OBJECTIVES:

OBJECTIVES: By the end of this lesson, students will:

- realize that if you know how many sides a shape has, you can construct it with the pen tool.
- observe that you can generate many outcomes, by changing the input parameter to a block.
- allow user to input number of sides.

STUDENT PAGE

WrapAround Slides

RUBRIC

- CSTA 2-AP-13: Decompose problems and subproblems into parts to facilitate the design, implementation, and review of programs.
- CSTA 2-AP-14: Create procedures with parameters to organize code and make it easier to reuse.

Students watch the video Aracely (3:10) then

Could Computer Science skills help Aracely get a well paying job?

What does Aracely want to do with technology.

Yes, Computer science offers a well paying job. Aracely would like to use technology to change the world and make it a better place.

Today students will make a Shape block with an input parameter of "Number of sides".

Direct students to student site, with handout.

Step 0: ( Optional) Change sprite to a pencil sprite, change it's origin to the pencil tip.

Students should explore making different shapes using this formula:

Turn angle is equal to ( 360 / number of sides)

- Did you notice your could have a lot of shape outcomes from a small amount of code? This is the power of using input parameters!
  1. Why do you think it is helpful to use Make-a-Block?
  2. The pen tool paints pixels directly on stage. What is the command to erase pen tool drawings?

1: It makes code readable;

Scripts become smaller, (instead of duplicating code, just call the block again);
Passing arguments to Make-a-Block allows for more outcomes, making it very flexible.

2: Clear command.