Lesson 1: Why Move Things Around? (Video)
Lesson 2: Definition of Translation and Three Basic Properties (Video)
Lesson 3: Translating Lines (Video)
Lesson 4: Definition of Reflection and Basic Properties (Video)
Lesson 5: Definition of Rotation and Basic Properties (Video)
Lesson 6: Rotations of 180 Degrees (Video)
Lesson 7: Sequencing Translations (Video)
Lesson 8: Sequencing Reflections and Translations (Video)
Lesson 9: Sequencing Rotations (Video)
Lesson 10: Sequences of Rigid Motions (Video)
Lesson 11: Definition of Congruence and Some Basic Properties (Video)
Lesson 12: Angles Associated with Parallel Lines (Video)
Lesson 13: Angle Sum of a Triangle (Video)
Lesson 14: More on the Angles of a Triangle (Video)
Lesson 15: Informal Proof of the Pythagorean Theorem (Video)
Lesson 16: Applications of the Pythagorean Theorem (Video)