References: Understanding Limits

1. Limit (mathematics) - Wikipedia - Thorough coverage of limit definitions, notation, and foundational properties. Directly supports the intuitive and formal limit concepts introduced in this chapter.

2. Limit of a function - Wikipedia - Detailed treatment of one-sided limits, infinite limits, and the epsilon-delta definition. Provides the rigorous underpinning for the graphical limit analysis in this chapter.

3. One-sided limit - Wikipedia - Focused explanation of left-hand and right-hand limits with examples and notation. Essential companion to the chapter's discussion of when two-sided limits exist.

4. Calculus: Early Transcendentals (9th Edition) - James Stewart - Cengage Learning - Chapter 2 presents limits with intuitive tables, graphs, and the precise definition, with extensive practice problems at multiple difficulty levels.

5. Thomas' Calculus (15th Edition) - Joel Hass, Christopher Heil, Maurice Weir - Pearson - Chapters 2.1-2.4 provide an accessible graphical and numerical approach to understanding limits with strong visual examples.

6. Limits Introduction - Khan Academy - Video lessons and interactive practice on limit concepts, notation, and estimation from graphs and tables aligned to AP curriculum.

7. Intuitive Definition of a Limit - Paul's Online Math Notes - Clear worked examples showing how to estimate limits from tables and graphs, with common pitfalls highlighted.

8. Limits and Continuity - Math is Fun - Gentle introduction to limits using everyday language and interactive examples, ideal for building initial intuition before formal definitions.

9. Essence of Calculus, Chapter 7: Limits - 3Blue1Brown - Visual exploration of what limits really mean geometrically, helping students move beyond rote limit evaluation to genuine understanding.

10. Limit Calculator - Symbolab - Step-by-step limit solver that shows intermediate algebraic steps, useful for checking work and understanding solution techniques.