Without the teachings of Quran, the life of a Muslim is far from ideal, especially because Muslims deem Allah as the most supreme Authority and pleasing Him is the ultimate objective of true followers of Islam. That is why Muslims always heed to Quran and Sunnah (the deeds of Prophet Muhammad PBUH all through his life).
Quran is what God Almighty taught to His Prophet (PBUH) and Sunnah is the practical implementation of all that heavenly teachings. Since God has settled death for every living being as a basic principle of life, after the departure of Holy Prophet Muhammad (PBUH), a means was needed to communicate all the teachings of God to guide humanity till The Day of Judgment.
So, Allah Almighty Himself was the first to Teach Quran to Prophet Muhammad (PBUH) so that His teachings can be communicated not only to people of the day, but for every single human being to come till The Day of Resurrection.
That is why Muslims take pride in teaching Quran to those who are devoid of this amazing knowledge of God, and those who teach Quran are considered as highly noble and respectable personalities of the society.