Create unit objectives. These are the intended outcomes of student participation in the unit. State objectives so that they begin with an action verb. A geometry unit objective could state: "Identify the three different types of triangles." It is necessary to produce objectives for the entire unit first because this will help to identify what specific lessons you will include.
Divide unit material into steps that increase with difficulty. You will want to teach vocabulary and basic concepts in the first lesson. This will be a review for the children and will allow you to gauge their current abilities before moving ahead. When you are designing the time frame for the unit, allow for an extra day in case your evaluation produces the need for more background information to be taught.
Start the unit content with teaching students basic geometrical concepts such as a point, rays, lines and line segments. Other concepts that need to be discussed in the early part of the unit will deal with how the lines and angles of shapes relate to each other. Examples of this concept include terms such as parallel, perpendicular, congruent. Students may use dry erase boards and markers throughout the unit to practice drawing the different concepts and shapes.
Continue the unit of study in geometry with lessons on basic shapes and their properties. During this phase, you will teach students about shapes such as parallelograms, rectangles, squares, octagons, pentagons and circles and how to determine the area and perimeter of different shapes. Have on hand three dimensional examples of these shapes for students to see and feel such as Styrofoam spheres, a tissue box or a Rubik's cube. These shapes have basic criteria dealing with the angles and sides. Shapes are categorized according to how the line segments within them relate to each other, having real life examples will help demonstrate these relationships to children. Students will need to have a firm grasp on these concepts before they can move on to more complicated material.
Present students with a culminating lesson that covers all material, basic and advanced. Quizzes may be given along the way to assess knowledge of the individual lessons. However, at the end of the unit, you want to challenge the students with a project or assessment that evaluates their total understanding of the material. Creating a geometrical project -- such as a robot where students are required to include shapes such as cylinders, rectangle boxes and spheres -- could provide children with an interesting opportunity to show what they have learned. Educators can also assess students by giving them a unit test that covers all material learned.