Natalie Fitzgerald talks about her role as graphic designer at Khan Academy.
Murrayl Berner talks about her role as part of Khan Academy's Adoption Team.
Nick Louie talks about his role as finance assistant at Khan Academy.
Tom Pryor talks about his role as a product manager and how and why he joined Khan Academy.
Karina Murtagh talks about her role as an office manager and why she joined Khan Academy.
How N-type and P-type semiconductors are made of silicon doped with phosphorous or boron.
Constructing a tangent line using compass and straightedge