Slave who sued for his freedom after being taken into free territory?

That slave was very,very famous I learned about him in 5th Grade at Coats Elem. School in Kansas! It was Dred Scott!

XxChocolate_BunnyxX
Dred Scott.

When denying him his freedom, the Supreme Court declared that slavery was protected by the Constitution - infuriating the abolitionists and raising the States' Rights debate to a new pitch.