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| Algebra Ideas | ||
| 24.Paper Folding to Generate a Parabola | ||
| Algebra Ideas | 25.Paper Folding to Generate an Ellipse | |
| 26.Paper Folding to Generate a Hyperbola | ||
| Geometry Ideas | 27.Using Concentric Circles to Generate a Parabola | |
| 28.Using Concentric Circles to Generate an Ellipse | ||
| Trigonometry Ideas | 29.Using Concentric Circles to Generate a Hyperbola | |
| 31.Sum of Limits | ||
| 词汇表下载 | ||
| Geometry Ideas | ||
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2.Introducing the Sum of the Measures of the Interior Angles of a Polygon | |
| 直通车 | 3.Sum of the Measures of the Exterior Angles of a Polygon. I | |
| 词典下载 | 4.Sum of the Measures of the Exterior Angles of a Polygon. II | |
| 留言板 | 5.Triangle Inequality | |
| 6.Don't Necessarily Trust Your Geometrics | ||
| 教师主页 | 7.Importance of Definitions in Mathematics (Geometry) | |
| 8.Proving Quadrilaterals to Be Parallelograms | ||
| 华东师大数学系主页 | 9.Demonstrating the Need to Consider All Information Given | |
| 华东师范大学主页 | 10.Midline of a Triangle | |
| 11.Length of the Median of a Trapezoid | ||
| 12.Pythagorean Theorem | ||
| 13.Angle Measurement with a Circle by Moving the Circle | ||
| 14.Angle Measurement with a Circle | ||
| 15.Introducing and Motivating the Measure of an Angle Formed by two Chords | ||
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16.Using the Property of the opposite Angles of an Inscribed Quadrilateral | |
| 17.Introducing the Concept of Slope | ||
| 18.Introducing Concurrency Through Paper Folding | ||
| 19.Introducing the Centroid of a Triangle | ||
| 20.Introducing the Centroid of a Triangle Via a Property | ||
| 22.Introducing Pi | ||
| 23.The Area of a Circle | ||
| 24.Comparing Areas of Similar Polygons | ||
| 25.Relating Circles | ||
| 26.Invariants in Ceometry | ||
| 27.Avoiding Mistakes in Geometric Proofs | ||
| 28.Systematic Order in Successive Geometric Moves-Patterns! | ||
| 29.Introducing the Construction of a Regular Pentagon | ||
| Trigonometry Ideas | ||
| 1.Derivation of the Law of Sines. I | ||
| 2.Derivation of the Law of Sines. II | ||
| 3.Derivation of the Law of Sines. III | ||
| 4.Introductory Excursion to Enable an Alternate Approach to Trigonometry Relationships | ||
| 5.Using Ptolemy's Theorem to Develop Trigonometric Identities for Sums and Differences of Angles | ||
| 6.Introducing of the Law of Cosines. I (Using Ptolemy's Theorem) | ||
| 7.Introducing of the Law of Cosines. II | ||
| 8.Introducing of the Law of Cosines. III | ||
| 9.Alternate Approach to Introducing Trigonometric Identities | ||
| 11.Using the Double Angle Formula for the Sine Function | ||
| 12.Making the Angle Sum Function Meaningful | ||
