A sample of PICA-X heat shield material subjected to temperatures of up to 1,850C (3,360F), at the Arc Jet Complex at NASA Ames Research Center, Moffett Field, Calif. The NASA-originated PICA material holds the record for high-speed reentry into the Earth's atmosphere. The SpaceX-developed and manufactured PICA-X variants meet or exceed the performance of the original material, to protect the Dragon spacecraft on its return to Earth. (Source: SpaceX)
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies.
You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived.
So if you can't attend live, attend at your convenience.