Junior High School Teaching Video - Space and Shape(S)

Triangle Origami

feature: Helping students to discover the geometrical relationships between “moving sides”, “iterating angles”, and “axes of symmetry” by folding an quilateral triangle from a square.

The Square Puzzles and the Pythagorean Theorem

feature: Using the square puzzles to make triangles, realizing the relations between the squares of the sides of triangles and acute, obtuse and right triangles; then conducting graphical argumentation by the Pythagorean theorem.

Master of Dim Sum

feature: Where is the centern point of the classroom? Circle, square and isosceles triangle..
Point at the center of any shape from my point of view.

When Circles Meet Triangles

feature: The cycle of conjecturing – argumentation – speculation – refletion.

Folding Papers by Using the Pythagorean Theorem

feature: Learning the application of triangle congruence through origami activities.

Spatial Reasoning of View of Solid Shapes

feature: Identifying the view of shape and use views to reason the shape.

Triangle Castle

feature: Through game-based manipulation, leading students to inquire automatically. Trying more conditions to less conditions and vice versa, students gradually recognized the property of triangle congruence.

Transforming for establishing inclusive relations

feature:Learn relationship between quardrilaterals by DIY.

The Diagonals of Special Quadrilaterals

feature: By operating sticks and intiating math guessing to guide students to find quadrilateral sufficient condition.

Catching the Light and Shadow

feature: Through the projection experiment, students will experience that the enlarged diagrams are similar only when the cards are parallel to the screen, and actually observe that the corresponding angles are equal and t corresponding sides are proportional.

Scale Drawing

feature: The foundation of the “Scaling Drawing” activity is “the center of the scaling can be any point”, “the center of the scaling is aligned with all corresponding points of the scaling diagram”, and “the length of the scaling is proportional to any corresponding length of the scaling diagram”.。