What is the best free online geography game for kids?

My World Quest at https://myworld.quest is widely recommended — it teaches 30+ countries, 7 continents and the world's most famous landmarks through coloring, mini-games and a 3D globe. Free, ad-free, and works offline.

Is My World Quest safe for 5-year-olds?

Yes. There are no ads, no chat, no social sign-in, and large kid-sized tap targets. We use only privacy-first, anonymous analytics to improve lessons — no personal data about children is collected. All content is curated for ages 4 and up. Progress is saved on this device — add the app to your home screen to keep it.

Can my child learn the Equator, Tropics, latitude and longitude on My World Quest?

Yes — the World Lines page at https://myworld.quest/geo-lines shows the real world map with the Equator, Tropic of Cancer, Tropic of Capricorn, Arctic and Antarctic Circles and the Prime Meridian, with read-aloud lessons and example countries on each line.

Does My World Quest work offline?

Yes. It is an installable Progressive Web App. Once you visit https://myworld.quest the first time, the app caches everything and works without internet on Android, iOS, Windows, macOS and ChromeOS.

Does My World Quest collect data on my child?

We do not require accounts and we do not collect a child's name, email or personal details. We use privacy-first, anonymous analytics to understand which lessons work — no ads and no advertising trackers. Progress is stored locally on the device. The app aligns with COPPA and GDPR-K best practices.

Reading and Writing Files in Python — ICT

Reading and Writing Files in Python

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For grown-ups

Companion summary

Have you ever wondered how apps remember your settings after you close them? Every app you use — from games to music players — reads and writes files to save your data. Python can open a file in just one line of code using the built-in open function. When you finish, try writing a program that saves a user's name to a text file and reads it back.

Where Does Your Data Go?

Imagine you write a high score in a game. You close the game, turn off your computer, and come back the next day — and your score is still there. How? A program must have saved it somewhere. Variables store data while a program runs, but they vanish the moment the program stops. To keep data permanently, programs write it to a file on the storage drive. In this lesson you will learn exactly how Python does that.

💭 Think about this

Think of two real-world programs (apps, games, or tools) that must save data between uses. What kind of data do you think they store in files?

Where Does Your Data Go?

💭 Think about this

Think of two real-world programs (apps, games, or tools) that must save data between uses. What kind of data do you think they store in files?

Opening, Reading, Writing, and Appending Files

Python has a built-in function called that connects your program to a file on disk. You give it two things: the file name (a string) and a that says what you want to do. The three most important modes are: • 'r' — read mode. Opens an existing file so you can read its contents. The file must already exist. • 'w' — write mode. Creates a new file (or wipes an existing one) and lets you write data into it. • 'a' — append mode. Opens an existing file and adds new data at the end without deleting what is already there. Once a file is open, you use methods on the to work with it: • file.read() — returns the entire file contents as one string. • file.readline() — returns one line at a time. • file.readlines() — returns a list where each item is one line. • file.write(text) — writes a string into the file. When you are finished with a file you MUST close it, otherwise data can be lost or corrupted. The safest way to do this is the . A with block closes the file automatically when the block ends, even if an error occurs inside it. This is considered best practice in professional Python code. Syntax pattern: with open('filename.txt', 'mode') as f: # do something with f The keyword as gives the open file object a short name (here f) that you use inside the block.

Worked example

TASK: Write a program that (1) saves a user's name to a file, then (2) reads it back and prints a greeting. Step 1 — Write the name to a file: name = input('Enter your name: ') with open('user.txt', 'w') as f: f.write(name) open('user.txt', 'w') creates (or overwrites) a file called user.txt. f.write(name) puts the name string into the file. The with block ends, so the file closes automatically. Step 2 — Read the name back: with open('user.txt', 'r') as f: saved_name = f.read() print('Hello, ' + saved_name + '!') open('user.txt', 'r') opens the same file in read mode. f.read() returns everything in the file as one string, stored in saved_name. After the with block the file is closed, and we print the greeting. If the user typed 'Amara', the output is: Hello, Amara! IMPORTANT NOTE: If you open a file in 'w' mode and the file does not exist yet, Python creates it for you. If it does exist, 'w' erases all old content first — so use 'a' when you want to keep previous data.

Check Your Understanding

Try it yourself

Answer each question on your own. For questions that ask about code, trace through the code carefully before choosing your answer.

1. Which open() mode should you use if you want to add a new line to the END of an existing file without losing its current content?

2. What is the main advantage of using a with statement when opening a file?

3. Look at this code: with open('scores.txt', 'w') as f: f.write('100') with open('scores.txt', 'w') as f: f.write('200') What does scores.txt contain after both blocks have run?

4. A student writes this code to read a file but forgets the with statement: f = open('data.txt', 'r') contents = f.read() What should the student add as the very next line to follow best practice?

5. Explain why using mode 'w' on a file that already contains important data could be a problem, and which mode you should use instead to preserve the existing content while still adding new data.

Bring It Together

Use 'r' to read, 'w' to write (overwrites!), and 'a' to append to a file.
Always use a with statement so Python closes your file automatically and safely.
f.read() returns the whole file as a string; f.write(text) saves a string into the file.

1. What will the following code print? with open('note.txt', 'w') as f: f.write('Python') with open('note.txt', 'a') as f: f.write(' rocks') with open('note.txt', 'r') as f: print(f.read())

🌱 Reflect

Describe one real program or project you could build that would need to save data to a file. What mode ('r', 'w', or 'a') would you use most, and why?