Math: Geometry: Visual Spatial Skills
These sites focus on visual-spatial skills. Includes information about orthographic and isometric projections, rotation of objects from different axes, cutting planes and cross-sections, object reflection and transformation, and symmetry. There are suggested ideas, simulations, and activities that can be used to promote visual and spatial skills. There is a link to eThemes Resource on Geometry: Symmetry.
BBC: Formal Drawing Techniques
This site provides information about basic formal drawing techniques including isometric projection, planometric and perspective drawings, and working drawing. There is a quiz at the end of a unit. Note: The "Talk" is a link to discussion forum.
Scroll down to find examples and exercises for orthographic and isonomic projections. Note: This site includes ads.
Lesson Plans: Introduction to Engineering Sketching and Drawing
In this lesson plan, students will learn about and practice orthographic and isometric projection sketching.
Use all seven Chinese puzzle pieces to make shapes and solve problems.
Use congruent figures to build pentominoes.
Learn about what happen to object's reflection through interactive manipulation.
Play with different objects and see the result of rotation transformations.
Explore the effect of applying a composition of translation, rotation, and reflection transformations to objects.
Cross Section Lesson
This 2-page pdf lesson plan provides an idea for teaching spatial-visualization skills through creating cross sections of solids.
Explore translations, reflections, and rotations in the Cartesian coordinate system by transforming squares, triangles and parallelograms.
Click on the plane simulations to learn about cross-section from different axis and angles. Note: The full version needs subscription.
eThemes Resource: Math: Geometry: Symmetry
These sites offer many examples of how symmetry works in a variety of shapes. Find out the difference between reflection and rotational symmetry. Includes interactive sites that let you draw symmetrical shapes and manipulate them. There is a link to an eThemes Resource on tessellations.