Stacks, Queues, and Linked Structures · Linked Structures

Linked List

Linked lists store data in nodes connected by references, which makes insertion flexible but random access slower.

Student Focus

Students practice diagrams first because linked-list bugs are usually reference bugs.

Guided Lesson Notes

How Code Scholars teaches Linked List

This guide helps students understand the idea, implement it carefully, explain the runtime, and recognize when the pattern belongs in a larger problem.

In a session, students usually start with a small trace, then write or review code, then test edge cases. The final step is a short explanation: what the structure or algorithm stores, why it is correct, and what changes when the input grows.

Key Ideas

  • Nodes and references
  • Head and tail pointers
  • Sequential traversal

Practice Prompts

  • Draw a list before and after an insertion.
  • Implement contains and size by walking node references.

Tutoring Connection

Turn the topic into usable problem-solving skill

Students can use this page before a lesson, after a difficult homework assignment, or while preparing for AP Computer Science A extensions, Advanced Topics in CS, USACO growth, or a college data structures course.