Lesson 4
Variables
This lesson introduces variables as a way to manage values in a program. Students will first be introduced to creating, naming, and setting the value of a variable in Scratch. They will then distinguish between local variables and global variables through a PRIMM activity. Finally, students will return to their simulations and create local variables to manage the energy levels of the organisms in their simulations.
school
Grade
7
local_library
Subject
Science
schedule
Length of lesson
50 minutes
Learning objective
Students will create local variables to manage a value.
Standards
CSTA Standards
- 2-AP-11: Create clearly named variables that represent different data types and perform operations on their values.
- 2-AP-19: Document programs in order to make them easier to follow, test, and debug.
- 3-DA-10: Evaluate the tradeoffs in how data elements are organized and where data is stored.
NGSS Standards
- MS-LS2-3: Develop a model to describe the cycling of matter and flow of energy among living and nonliving parts of an ecosystem.
Lesson contents
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