Shaun Errichiello

Shaun Errichiello
8th Grade Math
152 Lessons
Middle School 255 Salk School Of Science
New York, NY
Student Environment:
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Developing Right and Straight Angle Intuition
Big Idea: Introduce and explore the connections between supplementary and complementary angles using algebra.
  Favorites (15)   Resources (14)   Reflections (1)
Create Problems with Right and Straight angles
Big Idea: Students complete a mini-project creating problems involving angles for their classmates to solve.
  Favorites (0)   Resources (10)
Why Are Vertical Angles Equal?
Big Idea: Give students a chance to prove that all vertical angles are equal.
  Favorites (7)   Resources (10)
Create Vertical Angle Problems
Big Idea: Give students a chance to create problems around the concept of vertical angles.
  Favorites (1)   Resources (9)   Reflections (1)
Developing Transversal Intuition
Big Idea: Students get a change to make informal arguments about angles and explain why and when angles will be equal when they are cut by a transversal.
  Favorites (2)   Resources (12)
Create Transversal Problems
Big Idea: Students get a chance to create a challenging problem around transversals and revisit linear functions.
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Why Do Triangles Have 180 Degrees?
Big Idea: Students realize that triangles are the basis for defining all angle measure.
  Favorites (5)   Resources (13)   Reflections (1)
Walking Around a Triangle
Big Idea: In this investigation we open with AA criterion for triangles and help students discover that the exterior angles of a triangle (and any polygon) must always add to 360.
  Favorites (3)   Resources (9)   Reflections (1)
Defining Key Angle Relationships
Big Idea: We should let students observe the relationships between different types of angles and develop their intuition.
  Favorites (21)   Resources (14)   Reflections (1)
Triangle Sum Theorem Proof
Big Idea: When given the opportunity to connect their knowledge about lines and angles, students can deduce an important theorem.
  Favorites (3)   Resources (9)
Angles and Algebra
Big Idea: Using algebraic expressions for angles reinforces student understanding of basic algebra tools.
  Favorites (7)   Resources (10)
Super Practice with Angle Values
Big Idea: Students can use targeted practice to identify misconceptions and grow in mathematics.
  Favorites (5)   Resources (29)
Super Practice with Angle Values - Feedback session
Big Idea: Students need directed feedback to help understand the content they are learning in class.
  Favorites (0)   Resources (12)   Reflections (1)
Super Practice with Angles and Algebra
Big Idea: Students can only master a topic if they are given the opportunities needed to practice the topic.
  Favorites (12)   Resources (33)   Reflections (1)
Super Practice with Angles and Algebra - Feedback Session
Big Idea: Students can better understand a topic when they compare strategies and learn from each other's ideas.
  Favorites (0)   Resources (24)   Reflections (1)
My Little Transversal: A multi-day project lesson
Big Idea: Looking for a direct or an abstract connection to a concept can bring math content to life.
  Favorites (18)   Resources (14)   Reflections (2)
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