How were former slaves educated and what roadblocks did they encounter?

After the civil war the Emancipation Proclamation finally came into order. Which "freed" the salves of that time in the south, however states adopted "black codes" to keep the slaves down and back then it was very hard for a former slave of that time to obtain an education. Some teachers would set up secret night schools outside of the towns to educate former slave children, and if caught, the teachers would be imprisoned because of the fact they were trying to teach them. Obtaining an education for them was very hard because of all the southerners (and such) tried to keep them just as they were before just, sort of worse off. With the Emancipation Proclamation they were "free" however they had almost no rights thanks to the black codes of that time. It is sad how hard it was for them to get an education back then isn't it?