This unit explores Level 2 symmetry and transformation concepts. It involves the students making patterns that translate, reflect and rotate. The unit contains a variety of activities that explore these concepts through the context of a garden.
- Make shapes with tessellations.
- Investigate shapes that tessellate.
- Make geometric patterns by translating, reflecting and rotating.
This unit continues the development of symmetry that began in Pattern Matching, Level 1. The important things here are that the students recognise when an object has reflective symmetry because of the line of symmetry that it has. They should see that for rotational symmetry the object could be rotated round on top of itself. The students should also know that tessellations cover the floor or wall or some plane surface. There are no gaps or overlaps in a tessellation. They should also be able to make simple tessellations.
It would be helpful to introduce the unit by reading a book to the students that had a garden setting. An aim is to make a classroom display about a garden. These activities are starting points. Be as creative as you can! A variety of art materials will be used for this unit.
- Mosaic pattern blocks
- Coloured paper
- Split pins
- Blue tack
- Butterfly pictures
- School Journal Part One, Number 5, 1995, The Shapes of Leaves.
Session 1: Up the garden path
In this session students will explore shapes that tessellate or repeat to cover the plane without gaps or overlaps. Although the students will only be covering a strip (path) any covering of a path can be used to tessellate the plane simply by putting paths together.
- Explain to the students that they have the task of building a garden path. Show them examples of cobblestones if you can.
- Give them the mosaic pattern blocks and ask them to build a path using the pattern blocks as cobblestones. All the cobblestones must fit together without any gaps. Students are to select 1 or 2 shapes to build their path. The path needs to have at least 3 or 4 rows of blocks. Let them experiment with the mosaic pattern shapes to design their path.
- Students are to draw their path shapes and present them to the class describing the shapes that they have selected.
Create garden designs around the paths
Session 2: Bugs, Beetles and Butterflies
In this session students will be investigating line symmetry by making butterflies out of coloured paper.
- Show pictures of butterflies. Look at the wings.
- Ask students to make their own butterflies by folding and cutting.
- Encourage them to cut out pieces in the wings to add detail.
- Discuss line symmetry (reflection).
- Extend the activity to making other bugs and beetles by folding and cutting.
Session 3: Butterfly Painting
In this session students will make symmetrical butterflies with paint.
- Fold a piece of paper in half. On one half draw the outline of half of a butterfly. Create designs on this half of the wings with paint. Carefully fold the other half of the paper onto the wet paint. Unfold it to get a symmetrical pattern.
- Students could then make other bugs and beetles for the garden using the same technique.
Session 4: The Flower Garden
In this session students will be introduced to making symmetrical patterns with shape blocks. The theme for this lesson is flowers for the garden. Sunflowers would be a great example of this. Show students pictures of sunflowers or read the story "The Sunflower That Went Flop" (by Joy Cowley).
- Give students a piece of paper with a line drawn down the middle.
- Students use mosaic pattern blocks to make half of a flower pattern on one side of the line. They give this pattern to a partner who has to then repeat the pattern on the other side of the line making sure that it is symmetrical.
- Ask students to trace around the mosaic shapes to make the petal shapes. This can be done with coloured paper. Glue the petals onto the paper to make symmetrical flowers.
- This activity could be extended by letting students create their own symmetrical designs. They could experiment with cutting the paper shapes in half to create other pieces for their designs.
- These could then be displayed alongside the path designs from Session 1.
Session 5: The Garden Wall
In this session introduce students to the idea of translation. Students will be making tiles for the garden wall. Introduce the activity by showing them examples of some wall tiles.
- Give each student a piece of square grid paper, for example a 4x4 grid. Students are to draw a design by colouring in the squares to make a pattern.
- They make 3 or 4 copies of this pattern.
- Stick these in a row to make a row of tiles with repeating patterns.
- These could then be displayed above the flowers made in the activity from Session 4.
Session 6: Wind Catcher in the Garden
In this session students will make a wind catcher to illustrate rotation.
- Give each student a square piece of paper.
- Fold the square along its diagonals.
- Make cuts along the diagonals leaving about 1 cm uncut at the centre of the square.
- Take one of the cut ends at each corner and fold into the centre.
- Repeat this at each corner.
- Pin the folded pieces together with a split pin.
- Put a little piece of blue tack onto the back of the pin to hold the pieces in place.
- Attach the pin to a stick.
- Blow to watch it rotate.
Cut along lines in first image
The wind catcher has rotational symmetry but not reflective symmetry. This is because it can be rotated round onto itself but it doesn’t have a line of symmetry in the plane.
Session 7: Making Scarecrows
Each student is to draw a scarecrow on a piece of paper. Fold the piece of paper down the middle of the scarecrow. Cut down this middle line. Students then give their scarecrow to a buddy who has to draw the other half of the scarecrow making sure that the drawing is symmetrical. Stick one half of the scarecrow onto a piece of paper. A buddy draws on the other half. Finished scarecrows could be stuck onto sticks and displayed in the garden.
- Make designs for a dinner set for a picnic in the garden. Students could design a pattern for the pieces in the dinner set. The Willow Pattern story and plates could be used as motivation for this. Patterns around the edges of the plates would need to be repeating patterns.
- Paint patterns around the rim of pots. Plants could be planted in these pots.
- Make a patchwork picnic cloth with designs in each patch piece. This could be made out of paper or fabric. The patch pieces could show a tessellation or reflective symmetry.