Egyptians had mystery schools where secrets of the universe were learned. Egyptians even mastered flight and anti gravity.
I also suggest that you look into the ancient India and study Vedas, that civilization also had flight and the aircraft was called Vimana.
Do you have sources for these claims? Why would our "classroom teachers" want to hide this? What would be gained?
If these ancient civilizations had this amazing technology and understanding of the world, what happened to them? Why was this technology and information lost (and if it was lost, how do we know they had it)? And if there are those today who know about it, why aren't they replicating the technology and spreading the word? If this information is so "easily found" how are people kept so clueless, and by whom? Why?
While I don't debate the difficulty and cost of replicating the Pyramids, what makes you think we couldn't build them today?
Edit: By the way, I have seen the carvings which seem to depict what we consider flying machines (dirigibles, planes, helicopters, etc.). But I've also seen logical arguments explaining those carvings (meaning, showing they don't represent planes, etc.). Also, if they had some sort of technology far beyond what we have now, why would we presume to recognize it from a wall carving? How would we know what a super advanced, ancient egyptian aircraft would look like? I've seen the hypotheses and musings about the possibility of Egypt and others having advanced technology, but it has all been based on very weak "evidence" and was basically nothing more than wild speculation. You state it as if it's fact and anyone can descover these facts for themselves, yet we simultaneously don't understand it and it's being kept from us.
Edit #2: I also wonder what this has to do with the original topic.
You asked a lot of questions so let me try to answer them briefly. Of course I have sources for these claims. Like I said they are easily found on the internet. Just google "Vimana Shastra" or do extensive search on Egyptian technology. I can post few links but that would mean spoon feeding you information and I don't believe in it. Few links also wouldn't do justice to this broad topic, there are plenty of good information about this online google will do the trick. Now why would a classroom teacher (mainstream academia) hide this information? Mainly because ancient technology required no oil or fuel, they used free energy, levitation and anti gravity, utilizing solar energy and crystals. This technology is actually very cheap, so if we were told the truth, we would demand this technology for ourselves and all oil companies will go out of business overnight. So this is one reason why you are being mislead by conspiracy (mainstream academia) Second reason of why classroom teacher is full of shit is because if they admit to you that the ancient cultures were indeed advanced, it would rewrite an entire human history and severely challenge the theory of evolution, which is basically the bible of the New World Order and that is something they will never give up. So yes they will continue to teach you that our modern world is the most advanced ever existed.
Vedas and other ancient texts state that the world already ended few times due to natural disasters and also wars between various civilizations. These ancient technologies are thousands of years old, so this is why perhaps most of it is lost. However not all of it is lost and I believe most of it is held in the possession of the conspiracy. I honestly think that we haven't invented an airplane, rocket, submarine, automobile and other technologies, I think we simply recreated something that we found, something that the ancients had.
The problem is that we live in capitalist society where its not about science or technology but about money and profit. I mean look what happened to Tesla, he was ready to give the world free energy and look what they did to him and his works.
I mean you think that the governments of this planet are some benevolent beings that always serve the people with best science and best possible inventions known to men? That is the furthest from the truth, they deny us true technology and grab all the best for themselves, feeding us disinformation and indoctrinate us with falsehood every day.
But a simple research will tell you that the ancient world was extremely spiritual, extremely technologically advanced and very civilized. Another reason why the ancients are presented to be primitive is because most of this ancient civilizations were non white. Our modern academia is dominated by Western culture and may they are too afraid to admit that non whites were once capable of great things. We were taught that all great technology came from the West and that white man invented everything. So of course they are going to completely discredit Egypt, Babylon, ancient Maya or India.