Lesson 15

The Big Event

Students learn what events are and why they are useful in programs. They will learn to use the start on green flag events and end blocks in ScratchJr. Students will also become familiar with how to program more than one character using the green flag. This allows parallelism, or multiple subprograms executing at the same time.

Agenda

Ask: What do you remember about one of the ScratchJr programming blocks you used last class?
Unplugged Mini-Lesson: ScratchJr Simon Says Part 1: Single Moves (optional)
ScratchJr Mini-Lesson: using the green flag to trigger parallel programs to run at the same time
Independent Work Time: Parallel Programs
Reflection & Close-Out:
- What is one success you had while programming in ScratchJr today?
- What were you able to make your cat (or other character) do today?

Materials

Tablets: 1-2 per pair of students
ScratchJr Simon Says game (optional)

Vocabulary

event: an action that causes something to happen
program: a set of instructions written in a language that a computer understands

Additional Resources

The Big Event - optional unplugged activity about events from Code.org
Start on Green Flag and End Block Cards
Technology Brain Break: choose a video from this list!

Standards

CA CSS: K-2.CS.1 Select and operate computing devices that perform a variety of tasks accurately and quickly based on user needs and preferences.
CA CSS: K-2.CS.2 Explain the functions of common hardware and software components of computing systems.
CA CSS: K-2.AP.12 Create programs with sequences of commands and simple loops to express ideas or address a problem.

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