At least being up front and telling these kids that they could do their own research on the alternative view might be helpful. If you take away the alternative view as if it has been thoroughly disproven, then that is promoting a lie.
Scientific theory is not a lie.
It is not intention of the theory to be deception. For you to suggest it is a lie, clearly demonstrates you have no idea what a scientific theory.
What is a lie, is that you still continue belabour on confusing everyday use of the word of "theory", with that of scientific theory, even after scientific theory have been explained to you, time and time again. We have explained the differences between the scientific theory and colloquial meaning to theory are not the same things, so many times.
It is no longer about you being ignorant to what "theory" really mean in science, you are deliberately ignoring the real definition of "scientific theory". You are stubbornly refusing to learn from your mistake, which mean you are not only lying to others, but that you are lying to yourself.
How many times do we have to explain the differences? Who many times do we have to explain what scientific theory mean?
I don't think I ever suggested such a thing. What I suggested was giving children the truth about evolution. Tell them it is a theory, not a fact. Let them know that not "everyone" in the field of science accepts it as proven beyond all shadow of doubt.
The truth is that evolution is about how and why life change, because of an external environment changes (hence, Natural Selection, but also through Mutation) or through introduction of new population mixing with existing population (thus through Gene Flow, along with possibly Mutation).
Evolution is more about changes, occurring through genetics, that's all.
Evolution require life already existing to produce offspring, therefore it required parents and offspring, ancestors and descendants, so evolution can be traced, and even be directly observed, such as the case for viruses and bacteria.
The studies of diseases, especially viral diseases and vaccines, demonstrated a very practical and predictable studies of viruses. Without knowledge of evolution, we would have hard time, why viruses can become resistant or even immune to vaccines, because viruses can change. New strains of viruses occurred because it is trying to survive, and that basically what evolution is.
The changes don't need to change at genus or species level. Look at human body for instance. Our own body can become resistant to medicine, if we take them to frequently that it won't work. Your gene will change that the medicine won't be effective the more times you take them. That's not evolution. The "evolution" part come in, if you for instance become resistant to that medicine, and you have a child, he or she will inherit your genes, and become immune to medicine that you had originally taken, and so will any future descendants (eg grandchildren) in your line. That's evolution at work, and that doesn't require studying fossils; all it required is detail medical records of you, your children, grandchildren, etc.
What medicine might work for you now, might not work for your children or grandchildren.
This is why researchers keep making new medicine or vaccines, because the viruses and even human bodies eventually developed immunity from current medicine.
Evolution doesn't just out of nothing(like god creating plants and animals, fishes and birds from nothing, but god's magic words, in Genesis 1), or from non-life matters into life (like abiogenesis, or like in Genesis 2, when creating Adam from dust), and Evolution is not about first life (like abiogenesis or Genesis 1 & 2).
Why is that creationists so readily believe in superstitious magic from creation myths, but find the simple concept of natural phenomena of changes occurring, and finding factors that might govern changes (through Natural Selection or through Gene Flow; there are mechanisms in evolution, like Mutation, Genetic Drift and Genetic Hitchhiking)?
Evolution is not a lie, especially if you are studying medicine and diseases.
So calling evolution is lie, is not understanding evolution at all, or science in general. And right now you are being ignorant and you are lying to yourself when keep rejecting new knowledge and learning from your mistakes, or learning from knowledge that you don't have. And that's the tragedy of your ignorance.