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FREE TEACHER STORY UNIT · KS1 AND KS2

Ocean story lesson for KS1 and KS2

An underwater adventure for every year group. In KS1, our hero dives with Shelby the turtle to return a lost shell to the coral reef; in KS2, our hero tracks a sea turtle across the ocean with a marine biologist and writes a persuasive letter about plastic pollution.

When to use it
Any time during your oceans or seaside topic, and a good choice for the summer term.
Story world
Coral Cove
Subject focus
Geography · Oceans and habitats
Suggested story settings
Genre: Adventure · Length: 2 chapters · Time: 10–15 minutes

Story feel: Wonder & discovery. Story shape: Quest / journey.

About this unit

This unit takes children under the waves. The KS1 story is a short dive through a rock pool, a current and a coral reef, meeting sea creatures and clearing litter. The KS2 story follows a real-world journey: sea turtles really do travel long distances on ocean currents to lay their eggs on the beach where they hatched.

Both stories care for the ocean without frightening anyone. The writing in KS2 asks children to argue for one change that would cut plastic pollution, using evidence.

Choose a key stage

KS1The Turtle’s Lost ShellReception to Year 2KS2The Current RidersYears 3 to 6

KS1 (Reception to Year 2): The Turtle’s Lost Shell

Learning objective

Name sea creatures and describe their ocean habitat.

Talk questions

  1. Which sea creatures did our hero meet? Where did each one live?
  2. Why did our hero pick up the litter?

Writing task

Draw a sea creature. Write one sentence about it: 'A ___ lives in the ocean. It has ___.'

Suggested story settings: Genre: Adventure · Length: 2 chapters · Time: 10–15 minutes

The story brief

What the class story is asked to do. “Our hero” is the character your class chooses.

An underwater adventure for young readers. Our hero is exploring rock pools when a friendly sea turtle called Shelby swims up with a problem: a beautiful shell from the coral reef has been washed away by the tide. Our hero dives with Shelby, riding a gentle current, meeting a crab, a shoal of silver fish and a starfish, and picking up litter on the way. Use a repeated line children can join in with: 'Splish, splash, down we dive!' End with the shell back on the reef and the sea sparkling clean.

Word bank

ocean
a huge area of salty water
coral reef
a colourful underwater place built by tiny sea animals
current
water moving in one direction
tide
the sea coming in and going out each day
marine
to do with the sea

Text-type features: information report

Purpose: to tell the reader facts about a subject. Plan it with the free information report plan template.

Reception to Year 2

  • A title
  • Facts, not a story
  • Headings
  • Labelled pictures

National Curriculum statements

  • “discussing word meanings, linking new meanings to those already known”

    Year 1, Reading – comprehension (statutory)

  • “composing a sentence orally before writing it”

    Year 1, Writing – composition (statutory)

  • “writing for different purposes”

    Year 2, Writing – composition (statutory)

  • “name and locate the world’s seven continents and five oceans”

    Key stage 1, Geography (statutory)

  • “identify that most living things live in habitats to which they are suited and describe how different habitats provide for the basic needs of different kinds of animals and plants, and how they depend on each other”

    Year 2, Science (statutory)

Sample opening · KS1

A sample written for this page to show the brief in action. It is not the story Litsee writes for your class.

Our hero was peering into a rock pool when a round, wrinkly head popped up out of the sea.

“Hello!” said a sea turtle. “I’m Shelby. Can you help me? The tide washed a special shell off the coral reef, and I need to take it back.”

“Yes!” said our hero, and pulled on some goggles. “Splish, splash, down we dive!”

Under the water, everything was blue and green and wobbly. A crab scuttled sideways across the sand. A shoal of silver fish flashed past, all turning at the same time.

Then our hero saw a plastic bag floating by. “That shouldn’t be here,” they said, and tucked it into their pocket.

Model text (WAGOLL)

A model answer to the writing task, pitched at Year 2, written for this page. Read it with the class and find where it meets each success criterion.

A crab lives in the ocean. It has a hard shell and two big claws.

It walks sideways across the sand.

When the tide goes out, it hides in a rock pool.

What makes it good

  • A crab lives in the ocean. It has a hard shell and two big claws. Finishes both sentence starters with accurate facts.
  • When the tide goes out Uses a word from the word bank correctly.

By year group

Reception

Grammar focus: Capital letters and full stops

I’m Shelby.

Year 1

Grammar focus: Capital letters and full stops

Under the water, everything was blue and green and wobbly.

Year 2

Grammar focus: Expanded noun phrases

A week of lessons

  1. Lesson 1

    Hook

    • Put shells, a starfish picture and a toy turtle in a tray of sand. Ask: who lives in the sea? Then dive in with our hero.
    • Talk: Which sea creatures did our hero meet? Where did each one live?

  2. Lesson 2

    Plan

    • Talk: Why did our hero pick up the litter?
    • Words: ocean, coral reef, current, tide, marine.

  3. Lesson 3

    Draft

    • Write: Draw a sea creature. Write one sentence about it: 'A ___ lives in the ocean. It has ___.'

  4. Lesson 4

    Edit

    • Grammar focus. Capital letters and full stops: “Under the water, everything was blue and green and wobbly.”

  5. Lesson 5

    Publish

    • Make a class coral reef display with the sea creature pictures and sentences.
The printed plan adds the planning frame and the full steps for each lesson.

Support, core and stretch sheets

Support

Draw a sea creature. Copy and finish: “A ___ lives in the ocean.”

Core

Draw a sea creature. Write one sentence about it: 'A ___ lives in the ocean. It has ___.'

Stretch

Write about two sea creatures and say how each one moves.

Vocabulary mat

One A4 page for every table: the word bank with its meanings, sentence stems, useful words and grammar words.

KS2 (Years 3 to 6): The Current Riders

Learning objective

Explain how ocean currents and habitats work, and how people can protect marine life.

Talk questions

  1. How did the currents help the turtle on its journey?
  2. What could our class do to help keep oceans clean?

Writing task

Write a persuasive letter to a local council or school asking for one change that would cut plastic pollution, with three reasons and evidence from the story and the topic.

Suggested story settings: Genre: Adventure · Length: 2 chapters · Time: 10–15 minutes

The story brief

What the class story is asked to do. “Our hero” is the character your class chooses.

An ocean adventure for older primary readers. Our hero joins a marine biologist and her young assistant on a voyage to track a sea turtle across the ocean, riding the currents that carry it from its feeding grounds to the beach where it was born. On the way they learn how tides and currents work, visit a coral reef and help clear a patch of plastic pollution. Weave in accurate facts about oceans, continents and marine habitats. Show care for wildlife and calm problem-solving. End with the turtle arriving safely on the beach under the stars.

Word bank

ocean
a huge area of salty water
current
water moving in one direction
marine
to do with the sea
coral reef
a colourful underwater place built by tiny sea animals
pollution
rubbish or dirt that harms a place

Text-type features: persuasive letter

Purpose: to persuade someone to agree or act. Plan it with the free persuasive letter plan template.

Years 3 and 4

  • Opening: what I want and why
  • A paragraph for each reason
  • Persuasive words: surely, definitely, everyone
  • A question to the reader
  • A strong closing

Years 5 and 6

  • A clear point of view in the opening
  • Reasons backed with evidence
  • Answering the other side
  • Modal verbs and adverbs of possibility
  • A formal, polite register
  • A call to action

National Curriculum statements

  • “identifying the audience for and purpose of the writing, selecting the appropriate form and using other similar writing as models for their own”

    Years 5 and 6, Writing – composition (statutory)

  • “provide reasoned justifications for their views”

    Years 5 and 6, Reading – comprehension (statutory)

  • “organising paragraphs around a theme”

    Years 3 and 4, Writing – composition (statutory)

Sample opening · KS2

A sample written for this page to show the brief in action. It is not the story Litsee writes for your class.

The little satellite tag on the turtle’s shell blinked green on Dr Mensah’s screen.

“That’s her,” she said. “Number 47. She’s been feeding off the coast for three years, and now she’s heading home, to the beach where she hatched, to lay her own eggs.”

“How does she know the way?” asked our hero.

“Scientists think turtles can sense the Earth’s magnetic field, a bit like a compass,” said Dr Mensah. “And she doesn’t swim the whole way on her own strength. Watch.”

On the screen, the green dot moved into a wide blue band and began to speed up.

“An ocean current,” said Kwame, her assistant, grinning. “Like a motorway in the sea. She’s riding it.”

Model text (WAGOLL)

A model answer to the writing task, pitched at Year 5, written for this page. Read it with the class and find where it meets each success criterion.

Dear Head Teacher,

I am writing to ask you to put a water bottle refill station in our playground, so that we can stop buying plastic bottles.

Firstly, plastic bottles often end up in the ocean. Marine animals, such as sea turtles, can mistake plastic for food, which can make them very ill.

Furthermore, a refill station would save money. Families would not need to buy drinks in plastic bottles every day, and reusable bottles last for years.

Some people might say that one school cannot make a difference. However, if every child in our school used one fewer bottle a week, that would be hundreds of bottles a year that never reach the sea.

Please consider our idea. Our class would be happy to help design the posters.

Yours sincerely,

Class 5

What makes it good

  • I am writing to ask you States the request clearly at the start.
  • Some people might say that one school cannot make a difference. However, Answers the other side’s argument.
  • that would be hundreds of bottles a year Uses numbers as evidence to persuade.

By year group

Year 3

Grammar focus: Conjunctions to join clauses

Year 4

Grammar focus: Conjunctions to join clauses

Year 5

Grammar focus: Modal verbs and degrees of possibility

Furthermore, a refill station would save money.

Year 6

Grammar focus: Formal and informal language

A week of lessons

  1. Lesson 1

    Hook

    • Show a map with one turtle’s real migration route marked as a line. Ask: how could a turtle find its way across a whole ocean?
    • Talk: How did the currents help the turtle on its journey?

  2. Lesson 2

    Plan

    • Talk: What could our class do to help keep oceans clean?
    • Words: ocean, current, marine, coral reef, pollution.

  3. Lesson 3

    Draft

    • Write: Write a persuasive letter to a local council or school asking for one change that would cut plastic pollution, with three reasons and evidence from the story and the topic.

  4. Lesson 4

    Edit

    • Grammar focus. Conjunctions to join clauses: “The owl smiled because she knew the way.”

  5. Lesson 5

    Publish

    • Send the best letters to the school council, or to the people they are addressed to, and share any replies.
The printed plan adds the planning frame and the full steps for each lesson.

Support, core and stretch sheets

Support

Write a short letter with your request and two reasons, using the sentence stems.

Core

Write a persuasive letter to a local council or school asking for one change that would cut plastic pollution, with three reasons and evidence from the story and the topic.

Stretch

Answer the strongest argument against your idea before your final call to action.

Vocabulary mat

One A4 page for every table: the word bank with its meanings, sentence stems, useful words and grammar words.

Teaching notes

Use a world map to locate the five oceans and the seven continents, as the KS1 geography statement asks. Mark Shelby’s reef and the KS2 turtle’s route on it.

For KS1, make a class rock pool on the carpet with blue fabric and pictures of sea creatures, and let children describe one creature each before they write.

For KS2, collect evidence before writing: how much plastic reaches the sea, what it does to marine animals, and what has already worked (refill stations, beach cleans, reusable bottles). Persuasive writing is stronger with facts children have checked.

Printable lesson sheet

One A4 page for each key stage, ready for your planning folder: the story title, objective, story settings, talk questions, writing task, word bank with meanings, success criteria, curriculum statements and the sample opening to read aloud. Printing this page prints only the two sheets.

About this page

How it works · Sources

Sources

The curriculum quotations are copied word for word from these documents. Dates were checked on 29 October 2026.

About this page

Built from Litsee’s curriculum data. The topic words and their meanings, the year groups and the history, geography and science statements come from the topic data in the Litsee app, quoted word for word from the Department for Education’s documents; the text-type features and English quotations come from the app’s curriculum data. The story briefs, objectives, questions, tasks, sample openings, model texts and teaching notes were written for this page. Ideas or corrections? Email info@litsee.com.

Last updated: .

Questions parents and teachers ask

Which year groups is the oceans unit for?

Reception to Year 6. KS1 has a short dive to the coral reef; KS2 follows a sea turtle across the ocean and argues for less plastic pollution.

Is the pollution theme upsetting for young children?

No. In KS1, our hero simply picks up a plastic bag on the way. In KS2, the story focuses on calm, practical ways to help.

Is there an oceans word bank?

Yes. The oceans and seaside word bank has the topic words with child-friendly meanings, more nouns, verbs and adjectives, and a printable word mat.

Run this as a live class story in Litsee

In Litsee, a seasonal brief like this becomes an illustrated, narrated class story. You preview the first chapter before reading it with your class, and the class chooses what happens next together.

Start a free classroom trialSee Litsee for schools

Oceans story unit · KS1 (Reception to Year 2)

The Turtle’s Lost Shell

Learning objective: Name sea creatures and describe their ocean habitat.

Suggested story settings: Genre: Adventure · Length: 2 chapters · Time: 10–15 minutes · Story world: Coral Cove

Talk questions

  1. Which sea creatures did our hero meet? Where did each one live?
  2. Why did our hero pick up the litter?

Writing task

Draw a sea creature. Write one sentence about it: 'A ___ lives in the ocean. It has ___.'

Word bank

ocean
a huge area of salty water
coral reef
a colourful underwater place built by tiny sea animals
current
water moving in one direction
tide
the sea coming in and going out each day
marine
to do with the sea

Success criteria (information report)

Reception to Year 2: I can write facts. I can use a heading. I can label a picture.

National Curriculum statements

  • “discussing word meanings, linking new meanings to those already known” (Year 1, Reading – comprehension (statutory))
  • “composing a sentence orally before writing it” (Year 1, Writing – composition (statutory))
  • “writing for different purposes” (Year 2, Writing – composition (statutory))
  • “name and locate the world’s seven continents and five oceans” (Key stage 1, Geography (statutory))
  • “identify that most living things live in habitats to which they are suited and describe how different habitats provide for the basic needs of different kinds of animals and plants, and how they depend on each other” (Year 2, Science (statutory))

Sample opening (written for litsee.com, to read aloud)

Our hero was peering into a rock pool when a round, wrinkly head popped up out of the sea.

“Hello!” said a sea turtle. “I’m Shelby. Can you help me? The tide washed a special shell off the coral reef, and I need to take it back.”

“Yes!” said our hero, and pulled on some goggles. “Splish, splash, down we dive!”

Under the water, everything was blue and green and wobbly. A crab scuttled sideways across the sand. A shoal of silver fish flashed past, all turning at the same time.

Then our hero saw a plastic bag floating by. “That shouldn’t be here,” they said, and tucked it into their pocket.

Notes

Free from litsee.com/teachers/story-units/oceans-and-seaside

Oceans story unit · KS2 (Years 3 to 6)

The Current Riders

Learning objective: Explain how ocean currents and habitats work, and how people can protect marine life.

Suggested story settings: Genre: Adventure · Length: 2 chapters · Time: 10–15 minutes · Story world: Coral Cove

Talk questions

  1. How did the currents help the turtle on its journey?
  2. What could our class do to help keep oceans clean?

Writing task

Write a persuasive letter to a local council or school asking for one change that would cut plastic pollution, with three reasons and evidence from the story and the topic.

Word bank

ocean
a huge area of salty water
current
water moving in one direction
marine
to do with the sea
coral reef
a colourful underwater place built by tiny sea animals
pollution
rubbish or dirt that harms a place

Success criteria (persuasive letter)

Years 3 and 4: I can give a reason in each paragraph. I can use persuasive words. I can end strongly.

Years 5 and 6: I can back my reasons with evidence. I can answer the other side. I can use modal verbs and a formal register.

National Curriculum statements

  • “identifying the audience for and purpose of the writing, selecting the appropriate form and using other similar writing as models for their own” (Years 5 and 6, Writing – composition (statutory))
  • “provide reasoned justifications for their views” (Years 5 and 6, Reading – comprehension (statutory))
  • “organising paragraphs around a theme” (Years 3 and 4, Writing – composition (statutory))

Sample opening (written for litsee.com, to read aloud)

The little satellite tag on the turtle’s shell blinked green on Dr Mensah’s screen.

“That’s her,” she said. “Number 47. She’s been feeding off the coast for three years, and now she’s heading home, to the beach where she hatched, to lay her own eggs.”

“How does she know the way?” asked our hero.

“Scientists think turtles can sense the Earth’s magnetic field, a bit like a compass,” said Dr Mensah. “And she doesn’t swim the whole way on her own strength. Watch.”

On the screen, the green dot moved into a wide blue band and began to speed up.

“An ocean current,” said Kwame, her assistant, grinning. “Like a motorway in the sea. She’s riding it.”

Notes

Free from litsee.com/teachers/story-units/oceans-and-seaside

Try it in LitseeYour child creates the hero, picks the world and chooses what happens next, in an illustrated story that is read aloud.Start your free trialUse it in classRead an illustrated, narrated story together on the whiteboard, and let the class choose what happens next.Start a free classroom trialSee Litsee for schools