Introduction to Python: Lesson 1 – Hello Python and Environment

Lesson 1 – Hello Python and Environment (1.5 to 2 hours practical lesson plan, no tables)

3 minutes pre-class check

1. Computer can open VS Code

2. Terminal input python –version shows 3.x

3. GitHub account is logged in

Class timeline (90 min)

0–10 min Icebreaker Teacher says: Today we will use just 5 lines of code to make a little turtle draw a square. On-site question: Has anyone seen a Python turtle? (to liven up the atmosphere)

10–20 min Theory Flash

• REPL: The >>> that appears after typing python in the terminal

• Script: Write code into a .py file and run it with python xxx.py

• VS Code Debug Button: F5 to run, F10 to step through, breakpoints on the left

20–30 min Hands-on Environment Students follow along:

1. Open VS Code → Create folder lesson1 → Create file hello.py

2. Type print(“Hello Python”), press Ctrl + F5 to run

3. In the terminal, type python and press Enter to enter REPL, type print(“REPL”) to experience instant feedback

30–55 min Mini Project: Turtle Drawing a Square Steps: a) Create turtle_square.py b) Type line by line: import turtle as t for _ in range(4): t.forward(100) t.right(90) t.done() c) After saving, right-click Run Python File, a window pops up showing a black square Teacher explains line by line: import imports the library, for loop runs 4 times, forward moves forward, right turns right

55–70 min Classroom Challenge Change the square to red: Add a line t.color(“red”) before the for loop, run again to see it turn red immediately. Let students change the color themselves and take a screenshot.

70–80 min First Experience with Git Terminal sequence: cd lesson1 git init git add . git commit -m “feat: turtle red square” (Teacher demonstrates on-site, students are not required to register remotely, will follow up after class)

80–90 min Summary & Homework Assignment

• Remember three things: REPL interaction, script files, VS Code debugging

• Homework:

1. Change turtle_square.py to blue and submit to GitHub

2. Write one sentence in README: First lesson turtle work, attach a screenshot

5 minutes post-class Q&A

• Can’t close the turtle window? Ctrl + C or click the close button

• Color spelling must be lowercase: red, blue, green

• Next class preview: Variables and self-introduction cards

Class dismissed!