Part of Unit: Technical Sketching
Lesson Plan Overview / Details
Technical sketching is a necessary skill used by Architects, Engineers, & Contractors to communicate basic ideas in design and construction project work. This lesson starts with the very elementary practice of drawing straight lines without the aid of a straight edge. As we progress with our straight practice , the lesson will progress into geometric shapes such as triangles and also drawing lines at general angles such as 45 degrees. Proficiency in freehand technical sketching is communicating the idea without the use of words including elements of shading, perspective and detail. If the student sketches the classroom TV, does it look like a TV or a microwave? Proficiency is communicating! Try to understand that straight line practice in this lesson evolves into basic geometric shapes and then those basic straight line shapes are used to develop circles and arcs. Example - a square is used to develop a circle.
- One period
- 55 Minutes
Basic elements of straight line/sketching
California Career and Technical Education Standards
- ED.C.C1.2 Understand the development of graphic language in relation to engineering design.
- ED.C.C10.1 Understand the process of producing proportional two- and three-dimensional sket...
- ED.C.C10.2 Use sketching techniques as they apply to a variety of architectural and enginee...
- ED.C.C10.3 Use freehand graphic communication skills to represent conceptual ideas, analysi...
- ED.C.C3.2 Understand the degree of accuracy necessary for engineering design.
- ED.C.C4.3 Understand the various techniques for viewing objects.
- ED.C.C5.1 Understand the commands and concepts necessary for editing engineering drawings.
- ED.C.C5.5 Understand how to determine properties of drawing objects.
California Academic Content Standards (Reinforced)
- ELA.9-10.R.CAGT.2.5 Extend ideas presented in primary or secondary sources through original analysis...3
- M.7.MG.1.2 Construct and read drawings and models made to scale.11
Basic elements of straight line
- Students will improve their ability to use graphic language through sketching
- Students will freehand sketch basic geometric shapes
- Students will apply straight line practice to perspective architectural sketches
Activities in this Lesson
- Introduction and Holding the Pencil - Hooks / Set
Today we are going to practice how to hold a pencil and how to draw a straight line without a straight edge. Architects, Engineers and Contractors must be able to sketch what they see and what they are going to build, EVEN if they are drawing on wood. The written word is many times misunderstood but a simple sketch of the project will many times communicate an idea much better. The better we sketch, the better we communicate. Holding the pencil in a natural way is best. Hold the pencil back from the point. Demonstration here. This is not brain surgery, the instructor will go over the use of words like Horizontal, Vertical, and Diagonal(45 degrees)-these lines are accomplished without the use of a straight edge --This is developed skill- These simple lines will become simple objects -THUS communication without the use of the written word-which is something this entire generation of Americans has lost and simply does not understand.
- Sketching Lines PowerPoint [ Download ] Covers the purposes, techniques including size and proportion of sketching objects, the use of the standard alphabet of lines, and strokes used for sketching horizontal and vertical lines, arcs, and circles.
- Horizontal Straight Line Practice - Demo / Modeling
The instructor demonstrates drawing freehand equally spaced horizontal lines on the board. Students practice this at their desk. Hold your wrist stiff, movement comes from the shoulder.
Fill 2 pages of practice. To be checked by instructor walking around the room.
Drawing at their desks, students now draw practice vertical and diagonal PARALLEL lines filling two pages. Instructor circulates around the room--individual help.
- Straight Line Geometric Shapes - Demo / Modeling
Students use straight line practice to form geometric shapes. Instructor demonstrates Squares, rectangles, triangles, polygons on the board, then circulate around the room.
- Circles and Arcs/Proportion - Demo / Modeling
The teacher demonstrates using squares to help draw circles and rectangles to help draw ellipses. Students practice at their desk. The teacher will discuss proportion as necessary to improve what the object really is. If I draw a TV-it should not look like a microwave!
Basic Straight line elements
- Assessment Types:
- Demonstrations, Observations, sketches graded
Students will turn in all drawings to be checked and graded by the instructor. Line quality, neatness, proportion and symmetry will communicate the idea, without words. The straight line objects, such as 3D boxes and other simple industrial objects, will reflect how the object actually looks, hence communication without the written word.