From the LDS-HEA website:
President Boyd K. Packer
In many places it is literally not safe physically for youngsters to go to school. And in many schools--and it's becoming almost generally true--it is spiritually unsafe to attend public schools. Look back over the history of education to the turn of the century and the beginning of the educational philosophies....which have led us now into a circumstance where our schools are producing the problems that we face.
BYU, Oct. 9, 1996
President Brigham Young
I am opposed to free education as much as I am opposed to taking property from one man and giving it to another....Would I encourage free schools by taxation? No!
Journal of Discourses 18:357
President John Taylor
And then we want to study also the principles of education, and to get the very best teachers we can to teach our children; see that they are men and women who fear God and keep his commandments. We do not want men or women to teach the children of the Latter-day Saints who are not Latter-day Saints themselves. Hear it, you Elders of Israel and you school trustees! We want none of these things. Let others who fear not God take their course; but it is for us to train our children up in the fear of God. God will hold us responsible for this trust. Hear it, you Elders of Israel and you fathers and you mothers!
The Mind and Will of the Lord, John Taylor, Address 4:22