You’d expect teachers and tutors to know their thing. You wouldn’t expect them to have difficulties at blatant questions. Students know more then teachers. Ofcourse not all, but some. I wish to no way say I know more then all teachers, nor that I can take over a class from on of my teachers, but the information they provide is in no way allowed to be taken for fact. Some teachers know the topic they teach, and don’t spread inaccurate information or bad advice, but some do.
“So, can you power a lamp with a solar panel and thus have the lamp power itself?” asks a student, not a ridicules question but you’d expect the teacher to say no, with a good reason why not. The answer? “Yes” with no reason provided. The correct answer? “No, you can’t. The law of energy conservation states this is impossible. You cannot harvest 100% of the energy emitted by the lamp. This is because energy is wasted as heat and sound energy, or better kinetic energy.”, but the teacher lied.
While the teacher that said this was not specialized in physics, but when teaching this class as her primary lesson, she should be prepared enough to be able to answer a question like this, and not lie to the student and carry on without an explanation. Better yet, the teacher should tell the truth, and say she doesn’t know. If the teacher is truthful to the class, the students will learn to investigate these questions by themselves.
The fault is not entierly on the teacher tutoring the class either. The student must know to question answers, and respond with more questions regarding the answer. The student that got the answer of “Yes”, did not reply.
If the students does question it though, you may have the problem that the teacher will defend her propostition with all her might, and continue spreading lies, incorrect or inaccurate information to the students.Te
The only way for the students to learn, is if the teacher is truthfull about her knowledge about the topic. If she doesn’t know something, she should say she doesn’t know. Give motivation to the students to learn something the teacher doesn’t know.
In physics, the importants of units is fenominal. Adding apples and bannans is not possible. A teacher recently explain to our class that including units in equations creates problems. This however, is a blatant lie. Units are the single most important item in an equations. They determin your result and how you handle the number. If you have the question if a car went 60km in 2 hours, how fast did the car go? The student listens to this teacher and does 60 / 2 = 30. Finished. 30 what? Show should you know, you did 60/2? There is no unit there. So the students instead writes 60/2=30km/h. Now I will ask, “where did the km/h come from”. It just suddently appeared there, with no reason within the equation. Instead, the students should be writing the unit for every value they ever write. This would then look like 60km/2h=30km/h. Now we can clearly see where the km/h came from. We divded a km value by an hour value.
It was nicly answered here: http://physics.stackexchange.com/questions/138841/should-i-always-include-units-at-every-step by Ihle. “If the calculation is so long that it is actually an effort to write the units, then it is also so long that you should keep the units to make sure you dont make any mistakes“.
While this post was only about me ranting about science teachers, it applies to all tutors and teacher alike. If you are a teacher or tutor, please respect the fact that you may be wrong, you will be wrong sometimes. Please don’t take it as an insult, please allow the students who you teach to explain it to the class if you don’t know it yourself. If you don’t like it if students teach themselves, atleast don’t lie to the students, tell them that you don’t know.