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  Japanese Multiplication: Why Diagonal Lines? You might be asking yourself: Why do I always see the lines in the Japanese multiplication method on a diagonal? Well, that’s likely because the majority who are using and sharing the  Japanese multiplication method  may have no idea why it actually works.  By showing the lines diagonally, the base ten block array now organizes the intersection points in order of place value. Have a look below: As you can see above, an opportunity to circle back to place value and the importance of understanding that in base ten, we cannot have any number greater than 9 in any place value column. You’ll notice that the 10 one’s must be swapped out for a ten rod. So while many might consider this to be a pretty cool “trick”, it is much more powerful if students can articulate where procedures like these come from and why they work. This activity helps students to develop the intellectual power of the students . They are very much interest...

   3D SHAPES A 3D shape has three dimensions. Therefore, unlike a 2D shape, it’s not flat. 3D shapes are measured by length, width and depth. Types of 3D Shapes Cube Cuboid Cone Cylinder Sphere Pyramid Prism Cube A cube is a solid or three-dimensional shape which has 6 square faces. The cube has the following properties. All edges are equal 8 vertices 12 edges 6 faces Cuboid A cuboid is also called a rectangular prism, where the faces of the cuboid are a rectangle in shape. All the angles measure 90 degrees. The cuboid has 8 vertices 12 edges 6 faces Prism A prism is a 3D shape which consists of two equal ends, flat surfaces or faces, and also has identical cross-section across its length. Since the cross-section looks like a triangle, the prism is generally called a triangular prism. The prism does not have any curve. Also, a prism has 6 vertices 9 edges 5 faces – 2 triangles and 3 rectangles Pyramid  A pyramid a solid shape, whose outer faces are triangular and mee...