About seldatopal

I am a science teacher. I have been teaching for 15 years.

Biodegradable Toy Making

We conducted research on plastic pollution, which has become one of the most important problems of our time. We learned about the damage it causes to people, animals and plants. Then we developed solutions to this problem.One of these suggestions, we decided to make products with bioplastics that will save them from plastic wastes that degrade rapidly in nature and do not pollute the environment. For this purpose, we made plastics from milk casein. We have experimented to reduce odour and ensure durability. They made 3D prints of toy designs in order to get rid of plastic pollution and save children from microplastics with the mechanism we decided on last.

STEAM in activities:

In our study, new biodegradable toys were produced by using the engineering design cycle by utilizing the fields of



-materials engineering,



Seeds have been added to some toys and if they are thrown away, the environment will bloom.

Age range of students:11-17

Today, 3D printers have become quite common and even entered our homes for hobby purposes. ABS and PLA filaments are often used when producing in 3D printers. In 3D printers that have become so widespread, there are many particles released by the melted filament during production. According to research reports, particles emitted into the environment during 3D printing production create a carcinogenic effect in long-term contacts.

According to the research published by the American Medical Association, aerosol gases produced during 3D production can cause lung cancer and heart attack. Styrene, Caprolactam and lactic release are significant. In addition, since 3D products have pores on the surface due to the method, the probability of containing microbes is quite high.

PLA cannot be fully decomposed in nature. In this study, it was tried to produce protein plastic that can be used instead of PLA. For this purpose, casein protein in milk was precipitated. The acid type to be used during the study was determined as acetic acid (5% apple cider vinegar), milk/acid ratio 10/1 and production temperature 70°C as optimum values. It has been determined that milk plastic dissolves in organic solvents, but a waterproof film is formed after interaction with ammonia. In order to overcome the shortcomings of mold-prone milk plastic, it has been determined that 75% alcohol spraying can achieve the best anti-corrosion effect. Compressive strength properties were observed by adding various additives to the produced milk plastic. It has been observed that milk plastic is suitable to be used without heating instead of PLA used in 3D production.



Harvesting Rainwater is the implementation of our STEM lesson plan prepared for the Step by Step STEM etwinning project. Our project aims to increase our students' interest in Science, Technology, Engineering and Mathematics and to ensure the integration of STEM disciplines. My students are 10 years old.

Project-Based Learning
STEM Learning
Peer Learning
Cooperative Learning

21st-century skills and Creativity / Design Thinking / Inquiry-Based Science Education
Digital skills 

The starting point of our project is water pollution and correct use of water, which are among the environmental problems we encounter in daily life. It is aimed not to experience water shortage and to leave clean water to future generations. 

Students watched "25 litres" documantary with their families.
A selection of pictures is the author’s own (Attribution CC-BY)
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Sci-Eng eTwinning Project Environment STEM Activity

We prepare an eTwinning project with Science subjects with 12 different schools. The project aims to increase our students’ interest in Science, Technology, Engineering, and Mathematics, and to provide a more qualitative integration of STEM disciplines.

Why should we choose the environment in STEM education?

We live in the world, and we are the only creatures that harm the environment. We want students to realize this and find solutions to existing problems.

These environmental problems can occur suddenly or as a result of the development of many processes. Do our children have problem-solving skills? Will they be able to solve the problems they face? For these reasons, we put the environment and pollution at the center of our project. If the students are raised as conscious, solution-finding, and environmentally sensitive people, both new problems can be prevented and old ones can be solved. Their knowledge of STEM can help them solve real-life problems of daily life.


With the work done for the project implementation, we expect our students will:

  • develop their scientific thinking skills;
  • understand the correlation between mathematics and science.
  • learn that they have many options to solve the problems they see in their environment;
  • understand the nature of science and develop their skills in using ICT tools;
  • develop the ability to produce alternative solutions to problems with simple materials
  • use engineering design processes to solve a problem they encounter

Interdisciplinary Relations

With the STEM plan of our project, we used the disciplines of mathematics, science, art, engineering and ICT together in the environmental activity.

Working process

One of our subjects is the environment. In doing so we made a STEM lesson plan and all partners use it. One discipline is math. Students collected the daily waste in their homes separately as glass, plastic, organic, and paper. They measured the daily usage in grams and converted it into kilograms. They gathered the weekly, monthly and annual amounts as the project team of all schools and created a chart. When the days and people have shown this activity, the amount that comes out becomes very large.

A selection of pictures from the project practiceThe pictures are the author’s own–(Attribution CC-BY)

One discipline is science. Students search about fungus and bacterias. They learned to make compost with organic waste. All students made compost.

A selection of pictures from the project practiceThe pictures are the author’s own–(Attribution CC-BY
A selection of pictures from the project practiceThe pictures are the author’s own–(Attribution CC-BY)

Art is in our plan. We organized a competition to build a robot from our waste to learn about reuse. We voted the winner and made that robot the project mascot.

Champion of the reusing competition

A selection of pictures from the project practiceThe pictures are the author’s own–(Attribution CC-BY)

For ICT students prepare games and played them.

A selection of pictures from the project practiceThe pictures are the author’s own–(Attribution CC-BY)

For engineering
They engineered drip irrigation systems to reduce water use. At the same time, they created a virtual exhibition from the irrigation systems and posters they prepared.

A selection of pictures from the project practice– The pictures are the author’s own –(Attribution CC-BY)


Environmental awareness of our students, who are our future in environmental problems, has increased. Problem-solving skills improved.

They have become more enthusiastic about recycling and reuse.

About the author: Selda Topal – Secondary school teacher |Dumlupınar BİLSEM Afyonkarahisar/Turkey