🔒 CONFIDENTIAL — TEACHER USE ONLY 🔒

👩‍🏫

Secret Galactic Code Academy

Year 3 Teacher Solution Book

Complete Answer Key with Worked Examples

Syntax World — Planet Guide & Learning Paths

Teacher Name:

School:

Academic Year:

© 2026 InfiniCoreCipher — FutureTechEducation
Canon Authority: Katarzyna Kalina vel Kalinowska | v3.0 MASTER CANON LOCKED
Companion to: Year 3 Workbook v1.1 | COPPA & GDPR Compliant

👩‍🏫 SGCA Year 3 Teacher Solution Book — CONFIDENTIALHow to Use

🔒 CONFIDENTIAL — TEACHER USE ONLY — DO NOT DISTRIBUTE TO STUDENTS 🔒

📋 How to Use This Solution Book

This book provides complete worked answers for every activity in the Year 3 Student Workbook. Use it to mark student work, plan lessons, and identify common misconceptions.

✅ Answer Format

Each mission shows:
• Correct answers in green boxes
• Model code solutions
• Expected output
• Teaching notes
• Common mistakes to watch for

📝 Marking Guidance

• Accept reasonable variations
• Award partial credit where shown
• Focus on understanding, not exact wording
• Creative activities: mark for logic, not style
• Code: mark for correct output, not exact syntax

🗺️ Solution Book Structure

Zone	Missions	Key Concepts	Pages
🌿 Sequence Valley	1-3	Sequences, Algorithms, Flowcharts	5-15
🌱 Variables Garden	4-8	VAR FLOW Steps 1-4, Variable types	33-37
🌲 Loops Forest	9-12	FOR/WHILE loops, Infinite loops	38-44
🏜️ Condition Canyon	13-15	IF-ELSE, Boolean logic, AND/OR/NOT	46-53
🏙️ Functions City	16-18	Functions, Parameters, Return values	54-57
🏆 Final Quest	19-20	All concepts combined	60-66

👩‍🏫 SGCA Year 3 Teacher Solutions — CONFIDENTIALZone 1: Sequence Valley

🔒 CONFIDENTIAL — TEACHER USE ONLY

🌿

Zone 1: Sequence Valley — Solutions

Missions 1-3 | Theory Book Pages 5-15

2

What is a Sequence? — SOLUTIONS

CONCEPT | 100 XP | Pages 9-11

💡 CONCEPT

Activity 2.1 — Order the Steps (Making Tea)

Correct Order	Action
2	Add milk or sugar
1	Boil the water
3	Pour hot water into the cup
4	Add the tea bag
5	Remove the tea bag

📝 Teaching Note

Accept milk before or after tea bag — this is a genuine debate! Use it as a discussion point about how sequences can have valid variations.

Activity 2.2 — Write Your Own Sequence

Model answer (accept any logical 5-step sequence):

Step	Model Answer
1	Wake up and get out of bed
2	Wash face and brush teeth
3	Get dressed in school uniform
4	Eat breakfast
5	Pack school bag and leave

⚠️ Common Mistakes

• Steps in illogical order (eating before getting dressed) — discuss why order matters
• Steps too vague ("get ready") — encourage specificity
• Missing essential steps

Activity 2.3 — Chip's Coding Challenge

Grid: [C][ ][ ][ ][⭐] — Chip needs 4 MOVE commands then COLLECT:

Correct commands:

#	Command
1	MOVE
2	MOVE
3	MOVE
4	MOVE
5	COLLECT

Did Chip reach the star?

✅ Yes

📝 Note

The grid has 4 empty spaces between Chip and the star, so exactly 4 MOVE commands are needed.

Activity 2.5 — Star Challenge: Robot Algorithm

Model answer (minimum 8 steps, accept any logical sequence):

1. Enter the room 2. Look around the room 3. Pick up the first toy from the floor 4. Walk to the toy box 5. Place the toy in the toy box 6. Pick up the first book from the floor 7. Walk to the bookshelf 8. Place the book on the shelf 9. Pick up the vacuum cleaner 10. Vacuum the floor systematically 11. Put the vacuum cleaner away

📊 Marking Criteria

✅ Minimum 8 steps | ✅ Logical order | ✅ Specific enough for a robot | ✅ No ambiguous instructions

3

Algorithms in Action — SOLUTIONS

CONCEPT | 110 XP | Pages 12-15

💡 CONCEPT

Activity 3.1 — Sequence vs Algorithm

Description	Answer	Why?
"Make a sandwich"	S	Too vague — not precise enough
"Get 2 slices of bread. Spread 5g of butter..."	A	Precise and exact — robot could follow
"Go to school"	S	Too vague — no specific steps
"Walk to bus stop. Wait for bus 42..."	A	Precise and exact — robot could follow

Activity 3.3 — Test the Algorithm (Orange Juice)

Q1: What happens if step 3 before step 2?

✅ The orange juice would pour onto a closed carton and spill everywhere! You must open the carton before pouring.

Q2: What is missing?

✅ The algorithm doesn't check if the glass is clean first. A robot might use a dirty glass!

Q3: Improved algorithm:

1. Get a clean glass 2. Check the glass is clean 3. Open the orange juice carton 4. Pour orange juice into the glass (fill to 3/4) 5. Put the carton away in the fridge 6. Drink the juice

👩‍🏫 SGCA Year 3 Teacher Solutions — CONFIDENTIALZone 2: Variables Garden

🔒 CONFIDENTIAL — TEACHER USE ONLY

🌱

Zone 2: Variables Garden — Solutions

Missions 4-8 | Theory Book Pages 33-37

4

VAR FLOW Step 1: STORE — SOLUTIONS

CONCEPT | 100 XP | Page 33

💡 CONCEPT

Activity 4.1 — Variable Boxes

player_name = "Nova"

Label: player_name

Value: "Nova"

lives = 3

Label: lives

Value: 3

has_key = True

Label: has_key

Value: True

Activity 4.2 — Create Your Own Variables (Model)

my_name = "Alex" # Text — must be in quotes my_age = 8 # Number — no quotes my_year_group = 3 # Number — no quotes my_favourite_colour = "purple" # Text i_like_coding = True # Boolean — capital T!

⚠️ Common Mistakes

• Writing "42" — this is TEXT, not a number!
• Writing true (lowercase) — Python requires True with capital T
• Forgetting quotes around text values

5

VAR FLOW Step 2: CHANGE — SOLUTIONS

LOGIC | 120 XP | Page 34

🔮 LOGIC

Activity 5.1 — Trace the Variable

Code	Score value ✅
`score = 0`	0
`score = score + 10`	10
`score = score + 5`	15
`score = score - 3`	12
`score = score * 2`	24

Final value: 24

📝 Teaching Note

Work through this step by step on the board. Many students try to do it all in their head and make errors. Emphasise writing down each intermediate value.

Activity 5.2 — Story Variables

Event	Change	Lives ✅
Start	—	10
Falls in a hole	-3	7
Finds a health pack	+2	9
Hit by enemy	-1	8
Bonus level completed	+5	13
Final boss fight	-4	9

Final lives: 9

6

VAR FLOW Step 3: CHANGE → PRINT — SOLUTIONS

CODING | 130 XP | Page 35

💻 CODING

Activity 6.1 — Add the Print

1. name = "Explorer"

name = "Explorer" print(name)

Explorer

2. score = 50 + 25

score = 50 score = score + 25 print(score)

75

Activity 6.2 — Predict the Output

player = "Nova" xp = 100 xp = xp + 50 print("Player:", player) print("XP:", xp)

Player: Nova
XP: 150

level = 1 level = level + 1 level = level + 1 print("Current level:", level)

Current level: 3

8

Variables Garden Summary — SOLUTIONS

LOGIC | 120 XP | Page 37

🔮 LOGIC

Activity 8.2 — Error Hunt (5 Errors)

Buggy Code	Error	Fixed Code
`player name = "Alex"`	Space in variable name	`player_name = "Alex"`
`score = "100"`	Number stored as text	`score = 100`
`score = score + 50`	Now works (after fix 2)	`score = score + 50 ✅`
`print score`	Missing brackets	`print(score)`
`lives = lives - 10`	Should subtract 1, not 10	`lives = lives - 1`

👩‍🏫 SGCA Year 3 Teacher Solutions — CONFIDENTIALZone 3: Loops Forest

🔒 CONFIDENTIAL — TEACHER USE ONLY

🌲

Zone 3: Loops Forest — Solutions

Missions 9-12 | Theory Book Pages 38-44

10

Types of Loops — SOLUTIONS

CODING | 150 XP | Pages 39-40

💻 CODING

Activity 10.1 — FOR Loop Practice

1. Print "I love coding!" 3 times:

for i in range(3): print("I love coding!")

I love coding!
I love coding!
I love coding!

2. Print numbers 0 to 4:

for i in range(5): print(i)

0
1
2
3
4

📝 Teaching Note

range(5) gives 0,1,2,3,4 — NOT 1,2,3,4,5. Use range(1,6) for 1-5. This is a very common source of confusion!

Activity 10.3 — Trace the Loop

for i in range(4): print("Star", i)

Loop run	Value of i	What prints ✅
1st	0	Star 0
2nd	1	Star 1
3rd	2	Star 2
4th	3	Star 3

Activity 10.4 — FOR or WHILE?

Task	Answer ✅	Why?
Print "Hello" exactly 7 times	FOR	We know exactly how many times
Keep asking for password until correct	WHILE	We don't know how many attempts
Count from 1 to 100	FOR	We know exactly how many times
Keep playing until player runs out of lives	WHILE	We don't know when lives run out

12

Loops Step 4: EXIT — SOLUTIONS

DEBUG | 140 XP | Page 44

🐛 DEBUG

Activity 12.1 — Infinite Loop Spotter

Loop	Infinite?	Why?
count = 0, while count < 10, count += 1	❌ No	count increases each time, eventually reaches 10
count = 0, while count < 10, no change	✅ Yes	count never changes, condition always True
while True: print("Hello")	✅ Yes	True can never become False

Activity 12.2 — Fix the Infinite Loop

Loop 1 — Fixed:

count = 10 while count > 0: print(count) count = count - 1 # ← Fix

Loop 2 — Fixed:

score = 0 while score < 100: print("Score:", score) score = score + 10 # ← Fix

👩‍🏫 SGCA Year 3 Teacher Solutions — CONFIDENTIALZones 4 & 5

🔒 CONFIDENTIAL — TEACHER USE ONLY

🏜️

Zone 4: Condition Canyon — Solutions

Missions 13-15 | Pages 46-53

14

Boolean Logic — SOLUTIONS

LOGIC | 130 XP | Page 47

🔮 LOGIC

Activity 14.1 — True or False? (Full Answers)

Expression	Answer ✅
`5 > 3`	True
`10 == 9`	False
`"cat" != "dog"`	True
`7 >= 7`	True
`4 < 2`	False

Expression	Answer ✅
`100 == 100`	True
`"Nova" == "nova"`	False ⚠️
`3 + 4 == 7`	True
`10 != 10`	False
`5 <= 6`	True

📝 Teaching Note — Case Sensitivity

"Nova" == "nova" is False because Python is case-sensitive. This is a very common source of bugs! Discuss with students why computers treat uppercase and lowercase differently.

Activity 14.2 — Truth Table

A	B	A AND B ✅	A OR B ✅	NOT A ✅
True	True	True	True	False
True	False	False	True	False
False	True	False	True	True
False	False	False	False	True

15

Condition Canyon Learning Path — SOLUTIONS

CODING | 160 XP | Pages 50-53

💻 CODING

Activity 15.2 — Grade Calculator (Complete Solution)

if score >= 90: print("Grade: A ⭐") elif score >= 80: print("Grade: B 🌟") elif score >= 70: print("Grade: C 👍") elif score >= 60: print("Grade: D 📚") else: print("Grade: F — Keep trying! 💪")

Boundaries: A: 90+ | B: 80-89 | C: 70-79 | D: 60-69 | F: <60

🏙️

Zone 5: Functions City — Solutions

Missions 16-18 | Pages 54-57

17

Parameters — SOLUTIONS

CODING | 150 XP | Page 56

💻 CODING

Activity 17.1 — Add a Parameter

def greet(name): print("Hello,", name, "!") greet("Alex") greet("Nova") greet("Chip")

Hello, Alex !
Hello, Nova !
Hello, Chip !

Activity 17.2 — Two Parameters

def add(a, b): result = a + b print(a, "+", b, "=", result) add(5, 3) add(10, 7) add(100, 200)

5 + 3 = 8
10 + 7 = 17
100 + 200 = 300

18

Return Values — SOLUTIONS

CODING | 140 XP | Page 57

💻 CODING

Activity 18.3 — Trace CALL → RUN → RETURN

Stage	What happens ✅
CALL	`multiply(4, 5)` is called
RUN	a = 4, b = 5
RUN	result = 4 × 5 = 20
RETURN	Returns 20
After	answer = 20
Print	Prints 20

👩‍🏫 SGCA Year 3 Teacher Solutions — CONFIDENTIALFinal Quest Solutions

🔒 CONFIDENTIAL — TEACHER USE ONLY

🏆

FINAL QUEST — Complete Solutions

Mission 20 | 500 XP | All 5 Parts

P1

Part 1 — Sequence Challenge

⭐ 100 XP

Correct Order

Order ✅	Action
1	Print "Game Start!"
2	Create variable score = 0
3	Add 100 to score
4	Print "Level 1 complete!"
5	Add 150 to score
6	Print "Level 2 complete!"
7	Add 75 to score
8	Check if score > 200
9	If score > 200, print "Champion!"
10	Print the final score

📊 Marking: 1 mark per correct position | Full marks: 10/10

P2

Part 2 — Variable Vault

All 5 Errors Found and Fixed

Buggy Code	Error	Fixed Code ✅
`player name = "Explorer"`	Space in name	`player_name = "Explorer"`
`score = "0"`	Number as text	`score = 0`
`lives = lives + 10`	Should subtract 1	`lives = lives - 1`
`has_key = "True"`	Boolean as text	`has_key = True`
`level = level - 1`	Should add 1	`level = level + 1`

Corrected values: player_name="Explorer" | score=0 | lives=2 | has_key=True | level=1

P3

Part 3 — Loop Repair

Fixed Code

power = 100 while power > 0: print("Power:", power) power = power - 10 # ← This line fixes the infinite loop

Power: 100
Power: 90
Power: 80
Power: 70
Power: 60
Power: 50
Power: 40
Power: 30
Power: 20
Power: 10

P4

Part 4 — Condition Gates

Model Solution

access_level = 2 if access_level == 3: print("Admin access — all areas open!") elif access_level == 2: print("Teacher access — classroom areas open!") elif access_level == 1: print("Student access — learning areas open!") else: print("No access — please contact your teacher!")

Teacher access — classroom areas open!

📝 Marking Note

Accept any reasonable messages for each branch. Mark for correct IF-ELIF-ELSE structure and correct conditions (==3, ==2, ==1).

P5

Part 5 — Function Factory

Complete Model Solution

# Function 1: Greet the Explorer def greet_explorer(name): print("Welcome, Explorer", name + "!") print("The Academy needs your help!") # Function 2: Calculate rescue score def calculate_rescue_score(missions_complete, bonus): total = missions_complete * 100 + bonus return total # Function 3: Display the result def display_result(name, score): print("Explorer:", name) print("Rescue Score:", score) if score >= 400: print("🏆 SYNTAX WORLD SAVED!") else: print("Keep trying, Explorer!") # Call all 3 functions: greet_explorer("Alex") my_score = calculate_rescue_score(4, 50) display_result("Alex", my_score)

Welcome, Explorer Alex!
The Academy needs your help!
Explorer: Alex
Rescue Score: 450
🏆 SYNTAX WORLD SAVED!

📊 Final Quest Mark Scheme (100 marks total)

Part	Full Marks Criteria	Marks
Part 1: Sequence	All 10 steps in correct order (1 mark each)	10
Part 2: Variables	Each error found (1) + fixed (1) = 2 marks each	10
Part 3: Loop	Identifies issue (1) + correct fix (1)	2
Part 4: Conditions	Each correct branch (2 marks each × 4)	8
Part 5: Functions	Each working function (5) + called correctly (5)	10

👩‍🏫 SGCA Year 3 Teacher Solutions — CONFIDENTIALCommon Mistakes Reference

🔒 CONFIDENTIAL — TEACHER USE ONLY

⚠️ Common Mistakes Quick Reference

Mistake	Zone	How to Address
`player name = "Alex"` (space in name)	Variables	"Variable names are one word — use underscore: `player_name`"
`score = "100"` (number as text)	Variables	"Numbers don't need quotes. `score = 100` not `score = "100"`"
`print score` (missing brackets)	Variables	"print is a function — it needs brackets: `print(score)`"
`range(10)` gives 0-9 not 1-10	Loops	"range(10) gives 0,1,2...9. Use range(1,11) for 1-10"
Infinite loop (no exit condition)	Loops	"Every WHILE loop needs something that changes to make it stop"
`"Nova" == "nova"` is False	Conditions	"Python is case-sensitive! Capital letters matter"
Missing colon after `if`/`def`	All	"Python needs a colon `:` after if, elif, else, def, for, while"
Indentation errors	All	"Python uses spaces to show what's inside a block — be consistent!"
`return` outside function	Functions	"return only works inside a function definition"
Calling function before defining it	Functions	"Define the function first (def), then call it"
`true` instead of `True`	Variables	"Python Boolean values start with capital: True, False"
Forgetting `return` in function	Functions	"Without return, the function gives back None — add return!"

📊 Assessment Quick Reference

Level	Description	Game Evidence	Workbook Evidence
1 — Beginning	Identifies concepts with support	1 star, many hints	Partially completed, needs prompting
2 — Developing	Applies with some support	2 stars, 1-2 hints	Most activities completed, some errors
3 — Secure	Applies independently	2-3 stars, 0-1 hints	All core activities correct
4 — Mastered	Explains and extends	3 stars, 0 hints, portfolio	Star challenges completed