Answering in the very simplest of terms, teaching aids enable the teacher to deliver the content more efficiently and the students can imbibe and retain the knowledge better than just verbal delivery by the teacher.
The simplest teaching aid is the black board and chalk piece and the complex ones are the interactive tabs and touchscreen individual screens for students. The impact of the teaching aid depends on whether it is audio, visual or a combination of both which is commonly used. It can be an actual sample that is central to the topic that is physically used during teaching.
Let us consider the subject of water and nutrient transport by flowering plants from the ground level to the tips. This occurs via the xylem and phloem of the stem. For this to be explained to small students, it would be a dry subject if we just use a lecture to students. Instead, when we use a set of simple glass beakers, colored soultion (red, blue, green) and white crysenthaneium flowers, this would have a better impact
1. Select one teaching aid and show how you would use it in your lesson presentation.
We can use the 'actual objects' as we deliver the class or show an 'Audio-visual recording' of the experiment as 'Teaching aids'. The beakers will be half filled with the red, blue and green water solution (using food colours), then white flowers with a decent stem length would be placed in the beaker and left on a window sill or where sunlight comes in. After a few hours, we can see that the white flower and its petals have turned into the shade of the coloured water in which they are kept.
2.Indicate why the teaching aid is relevant for the subject content of the lesson your teaching.
Here, we are trying to explain to kids that water and food go from the roots via the xylem in the stem to other parts of the plant. To enable the children to understand the concept, we have recreated this in a simple manner that can get children involved and excited to see the color change happening in front of their eyes.
3.Show how the teaching aids simplifies the content to your learners.
This real experiment or a recorded (AV display) simplifies the lesson beautifully in a manner that children can grasp, remember with fun rather than just memorize the theory stuff. We are trying to teach about the movement of water and nutrients from roots to the flowers and leaves via the xylem. Using the teaching aid, we will explain that the coloured solution is the water and nutrients that is available for the roots, as the white flower shows the colour of the water in the beaker, we will imply the fact that the coloured water has been transported by the stem from the beaker to the flower petals.
IMAGE CREDIT: https://community.dearest.io/transpiration-experiment/