Vertebrates and Invertebrates KS2
Teaching vertebrates and invertebrates in KS2 helps children understand one of the most important ways scientists classify living things. By learning the differences between vertebrates and invertebrates, children begin to recognise how animals are grouped according to their characteristics and how scientists organise the natural world.
This guide explains what vertebrates and invertebrates are, provides examples of each group, and includes a free downloadable lesson to help you teach KS2 animal classification in an engaging way.
Teaching vertebrates and invertebrates in KS2?
Save planning time with this ready-to-teach Year 3/4 Science lesson which teaches children to classify a variety of vertebrates and invertebrates using a branching database.
What Are Vertebrates and Invertebrates?
Animals can be divided into two main groups:
- Vertebrates – animals that have a backbone or spine.
- Invertebrates – animals that do not have a backbone.
Scientists use this classification system to organise animals based on their physical characteristics.
Although there are many different types of animals on Earth, only around 5% are vertebrates. The vast majority are invertebrates!
What Are Vertebrates?
Vertebrates are animals with an internal skeleton that includes a backbone. Vertebrates are further divided into five main groups:
- Mammals
- Birds
- Fish
- Reptiles
- Amphibians
Examples of vertebrates include:
- Lions
- Humans
- Frogs
- Sharks
- Eagles
Many KS2 Science lessons explore how animals within these groups share common characteristics, even though they may look very different.
What Are Invertebrates?
Invertebrates are animals that do not have a backbone. Some have soft bodies, while others are protected by an external skeleton called an exoskeleton.
Common groups of invertebrates include:
- Insects
- Arachnids
- Crustaceans
- Molluscs
- Annelids (worms)
Examples of invertebrates include:
- Butterflies
- Spiders
- Crabs
- Snails
- Earthworms
Invertebrates make up the largest group of animals on Earth and can be found in almost every habitat.
Vertebrates and Invertebrates KS2 Comparison
| Vertebrates | Invertebrates |
|---|---|
| Have a backbone | Do not have a backbone |
| Internal skeleton | May have an exoskeleton or soft body |
| Five main groups | Many different groups |
| Examples include birds, fish and mammals | Examples include insects, spiders and worms |
Why Do Children Learn About Vertebrates and Invertebrates in KS2?
Learning about vertebrates and invertebrates in KS2 supports children's understanding of scientific classification. It helps pupils:
- Identify similarities and differences between animals.
- Understand how living things are grouped.
- Develop observation and sorting skills.
- Use scientific vocabulary accurately.
- Prepare for more advanced classification work later in their education.
These concepts form an important part of the KS2 science curriculum, particularly when studying living things and their habitats.
Free Vertebrates and Invertebrates KS2 Lesson
Looking for a ready-to-teach lesson on classifying animals?
Download Lesson 3 from our popular Desert Life scheme of work completely free. In this engaging lesson, children investigate desert animals and classify them as vertebrates or invertebrates while developing their understanding of animal groups and habitats.
The lesson includes:
- Ready-made lesson slides
- Differentiated activities
- Teacher guidance
- Printable resources
- Assessment opportunities
Teaching Ideas for Vertebrates and Invertebrates KS2
- Sort animal picture cards into vertebrate and invertebrate groups.
- Create branching databases to classify animals.
- Conduct a minibeast hunt and identify local invertebrates.
- Research unusual vertebrates from different habitats.
- Design classification keys using animal characteristics.
Practical classification activities help children understand that scientists group animals based on observable features rather than where they live or what they look like.
More Animal Classification Resources
If you're teaching animal classification, habitats or adaptation, explore our full range of Science resources. Our complete schemes contains clear sequences of engaging lessons that help children investigate living things while developing their scientific enquiry and classification skills.
🪵 Living in Environments (Year 4 Science)
🐿️ Classifying Organisms (Year 6 Science)
🌳 Rainforest Habitats (Year 3/4 Science)
🐒 Animals of India (Year 3/4 Science)
⛰ Mountain Habitats (Year 5/6 Science)
