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 1a: (When it's a Mary Jo term)
To learn how to program sprites to move using go to, glide and move blocks.
To learn how to get a sprite to draw using the pen blocks.
Activator: Share your sprites with the class.
Point in Direction, Goto, glide, move.
Pen down, pen up
Get your sprites to move around the stage and draw something using the pen tools.
Wrap-up: Save and sign out
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.