Solid figures

A solid figure is an element that has three dimensions. They are geometrical figures that have volume and take up a place in the space.

In the teaching of the solid figures, the teacher has to remind their knowledge about figures in the plane. Maybe the teacher can combine two ways of teaching solid figures.

On the one hand, he or she can show them the figures in 3 dimension and from it go depth in the development of the figures.

On the other hand, the teacher can start asking children how to build a cylinder. In this way, the teaching of the solid figures will start from the development and go to the build of the figure.

In my opinion, the better option is to mix both ways of teaching these figures. Maybe we can start with the first way and then when they have understood the meaning of three dimension figures and how to develop it, they can use the development of the figure to build it. 

In this picture, you can see an example of how they can build a three-dimensional figure on their own.

To get an understanding of the characteristics and properties of these figures, teachers can use a huge variety of resources.

One way could be to encourage them to compare the characteristics of the figures on the plane with solid figures. 

Another option is to start finding the main characteristics of a figure by using direct observation. Moreover, in the teaching-learning process of solid geometry, it is interesting to use manipulative resources, as well as, relate the figures with quotidian objects that students see every day. And for this, it is not necessary to spend money. If the school don't have this type of three-dimensional materials, teachers can use an object from the classroom or even simple materials. 

Some resources could be the use of gummies, pasta, cylinders of toilet paper,  plasticine, clay, or any object that have different figures to study. Also, it is interesting to use the ITC in which they can make exercises and practices about the theme.

This video is an interesting resource that can be used to introduce the topic to the students. From the video, they can identify the different solid figures. Furthermore, the geometrical figures are related to the object that they have in their lives. The video is only one example of an interesting tool that can be used in class.