# Data Structures KS3 Resources

## Teach KS3 Students About Data Structures, Save Hours of Prep!

Do you want to save hours of lesson preparation time? Get your evenings and weekends back and focus your time where it's needed! Be fully prepared with presentations, notes, activities, and more.

All Computer Science topics are covered, and each module comes complete with:

• Classroom Presentations
• Revision Notes
• Activities & Quizzes
• Mind Maps, Flashcards & Glossaries

#### What is a data structure?

A data structure is a way of organizing and storing data in a computer so that it can be accessed and modified efficiently. Examples of data structures include arrays, linked lists, stacks, queues, trees, and graphs.

#### What is a linked list?

A linked list is a data structure that consists of a chain of nodes, each containing data and a reference to the next node. Linked lists are used for dynamic memory allocation, and can be used to implement other data structures like stacks and queues.

#### What is a stack?

A stack is a data structure that follows the Last In First Out (LIFO) principle. It consists of a collection of elements, where the last element added is the first one to be removed (pop). It can be visualized as a stack of plates, where the plate on the top is the one that will be removed first.

#### What is a queue?

A queue is a data structure that follows the First In First Out (FIFO) principle. It consists of a collection of elements, where the first element added is the first one to be removed (dequeue). It can be visualized as a line of people waiting for a bus, where the first person in the line is the first one to board the bus.

#### What is a tree?

A tree is a data structure that consists of a set of nodes that are connected by edges. Each node in the tree can have zero or more children, but only one parent, except the root node which has no parent. Trees are used to represent hierarchical relationships and can be used to implement other data structures like binary search trees and heaps.