How to Conduct Free Online Classes

Introduction of Tech Tools:

1. Easyclass (https://www.easyclass.com/) Learning Management System
Easyclass is a platform that allows educators to create online classes whereby they can store the course materials online; manage assignments, quizzes, and exams; monitor due dates; grade results and provide students with feedback all in one place.

2. Zoom Classroom (https://zoom.us/) Video Conferencing, collaborations, virtual classrooms
Increase student participation and learning retention with virtual and hybrid classrooms and micro-learning.

3. Microsoft Teams (https://teams.microsoft.com/start)
Microsoft Teams is a hub for teamwork in Office 365. Keep all your team's chats, meetings, files, and apps together in one place.

4. Hypersay (a platform for live interactive presentations)
Go beyond slides with live quizzes, live subtitles, automated feedback and many more. It is free for maximum of 20 participants per session.
https://hypersay.com/live-presentations/

5. Nearpod (Students Engagement Platform) https://nearpod.com/
Interactive Lessons that can be remotely led by the teacher.

6. Google Form (For online Quiz/Test)
Use google form for assessment purpose and take online quizzes. It also has features like randomization, result declaration, grading and item analysis. https://www.google.com/forms/about/

7. Google Classroom (Teaching and Learning Platform)
An online teaching and learning platform. Teacher can make online classroom, upload teaching material and conduct online quizzes.
https://classroom.google.com

8. Edmodo (Learning Management System)
Share class announcements, learning materials, and make learning accessible anywhere
https://www.edmodo.com/

9. Mentimeter (Interactive Learning Platform)
Make your audience feel involved by enabling them to contribute to presentations with their smartphones and show the results live.
https://www.mentimeter.com/

10. Brainpop (Educational tool)
BrainPOP makes rigorous learning experiences, make interactive presentations, videos to engage all students in teaching and learning process.
https://www.brainpop.com/

11. Flipgrid (Video creation)
Flipgrid empowers every voice from grade 1 to PhD classrooms across 190 countries.
https://info.flipgrid.com/

12. Edufow (Education)
Make learning and teaching more effective with active participation and student collaboration
https://www.eduflow.com/

13. Video Ask by Typeform (https://www.videoask.com/)
Interactive Video Chat for remote face to face interactions

14. Google Hangouts Meet (Video Conferencing)
Stay connected with teachers and students for teaching and learning and official academic work.
https://meet.google.com/_meet…

15. Youtube Videos (Uploaded Videos)
You can make your classroom channel and upload your lecture videos.

16. Screen Recorders
There are numerous screen recoding videos like ScreenHunter, Camtasia screen recorder, windows screen recorder, etc. Using these tools, teacher can make tutorial videos.


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How Geothermal Energy Works

Geothermal energy is a very interesting energy source that has garnered a lot of attentions today because of the immense need to global dependence on fossil fuel and the resultant negative consequences. As the name implies geothermal energy is simply energy that is contained in intense heat which continuously flows deep within the earth. Studies show that deep in the energy contained deep within the earth crust, some 10000 meters down the surface of the earth, is 50,000 greater than all the oils and natural gases in the world put together. Such tremendous amount of energy can be interestingly utilized and tapped to supply the energy requirements of the world.

Interestingly, geothermal energy is already being tapped in many regions of the world especially in the United States of America. The United States make use of geothermal facilities to provide up to 68 billion KWh electricity which is enough to serve more than 6 million household per annum. Most of the U.S geothermal facilities are located in California.

Capturing Geothermal Energy

The techniques involved in capturing geothermal energy are very interesting. Basically geothermal energy is obtained from naturally occurring hydrothermal convections. This technique involves allowing cooler water to seep into to the Earth’s crust. The water is heated up by the intensive heat taking place in the core and then it rises to the surface. The heat can then be tapped when it rise to the surface and used to drive steam engine or used as desired. Once the heat is captured, it can be used in various ways to generate electricity. How it is used depends on a number of variables which will be discussed shortly.

-          Dry Steam: One of the ways of capturing and using geothermal power is known as dry steam. In this process, the steam captured from the core is directed directly to the turbine where it is condensed into water in a condenser. This is a relatively simple design and a very easy process of capturing and using the energy. The energy tapped can be used to drive the turbine and the water directed back to the core to continue the cycle.

-          In the second process, the hot water obtained from the earth’s core can be depressurized. The process of depressurizing the hot water can also be referred to as flashing. When depressurized, the hot water becomes steam and this can be used in driving the turbine for generating electricity and the resultant warm water can then be channeled back to the core to continue the process.

-          Thirdly, we have the Binary cycle system which is commonly used but is actually the most complicated of the three. The binary cycle system involves the passing of the hot water obtained from the geothermal reservoir through a heat exchanger. Here in the heat exchanger, the hot water heats up a liquid, in most cases isobutane can be chosen as the choice liquid. The major property to consider when choosing the liquid is its low boiling point. The liquid should be easily converted into steam which is then used to drive the turbine and generate electricity.