How can I demonstrate to my schoolmates the authenticity of the Quran as the book of Allah (SWT) and potentially inspire them to consider Islam?
The miracles of Quran are countless covering every dimension of the Holy book from its linguistic miracles to the members of related words and meanings to the scientific facts mentioned in Quran to numerical miracles to miracles to medical facts to facts in every field of science. The scientific facts in Quran had amazed many scientists and made them accept and confirm the fact that Quran can never be written by any human being but it is from God.
There are hundreds of books written in this subject e.g. This is The Truth by Akram Hamed published by Amazon and many and many other books which can easily found in the in the internet if you just sear : Scientific facts in Quran.
'You can tell your schoolmates to read the statements of leading scientists after discovering the miraculous facts mentioned in Quran.
Wassalam.