Scratch Part 4: Pen Tools and Geometry
- To gain a better understanding of geometry: including angles, geometric figures and some geometric terms (polygon, quadrilateral, equilateral, equiangular, closed, open, regular, supplementary angles, internal angles, external angles.)
- To experiment with math in a fun way.
- To add more programming skills to your Scratch tool kit.
Lesson 1: Geometry
Objective: To expand our knowledge of angles, triangles and other geometric shapes.
Activator: Tell me what you know about squares. Tell me what you know about triangles.
Math Vocabulary: polygon, regular, supplementary angle, complementary angle
Finding the internal and external angles of geometric figures
Find the internal and external angles of:
a square, triangle, pentagon, hexagon, octagon.
Record your information in a chart in your composition books.
Wrap-up: Does a circle have internal and external angles? Why or why not?
Lesson 2: Pen Tools
Objective: To learn how to use the Scratch pen, turn, and move scripts to draw geometric shapes.
How could you make a sprite walk (using repeat, move, and turn) in a square path?
(Write the code in your composition books.)
How would we draw a triangular path?
Internal and external angles
Create a project where your sprites draw:
a square, triangle, pentagon, hexagon, octagon, and a circle.
Wrap-up: Save this project to work with again tomorrow.
Lesson 3: Make Your Own Blocks
Objective: To learn how to make your own blocks in Scratch.
Activator: What did you learn about polygons and angles in our last class?
Mini Lesson: Learn how to use More Blocks to make your own block. Experiment with shape blocks to create spirals.
Student Engagement: NOTE: Open the Polygon projects that you already created and edit it.
Use the make a block command, so that you have a block for each shape where the size of your shape can vary.
Make blocks for:
1. a square
2. a regular triangle
3. a regular pentagon
4. regular hexagon
5. a regular octagon
6. a circle
Wrap-up: When you are done, save your work. You will build off of this project tomorrow.
Lesson 4: Geometry Project
Objective: To combine your polygons and circles in different ways to draw beautiful geometrical figures.
Activator: Look at some examples of geometrical figures.
Mini Lesson: How to use your shapes to make cool spirographs.
Student Engagement: Experiment with your shapes. Add a spirograph to your project..
Wrap-up: When you are done, save your work.
Lesson 5: Spirals
Objective: To learn how to make a variable in Scratch. To add a spiral to your geometry project.
Activator: What is a variable?
Mini Lesson: Learn how to make a variable. Look at spirals? Use variables to make a spiral.
Student Engagement: Make spirals and experiment with shapes and pen tools.
Wrap-up: When you are done, share your work.
Lesson 5: Tesselations (Haven't done this yet.)
Objective: To learn how to tesselate a square
Activator: Escher Video
Mini Lesson: How to tesselate a square in Scratch
Student Engagement: Create a square sprite using translation.