blackpenredpen (YouTube math)

The blackpenredpen channel is created and hosted by Steve Chow, a math instructor who previously taught at Wilbur Wright College. He uses the channel to share his deep passion for solving complex calculus, algebra, and physics problems. His teaching style is highly regarded for breaking down intimidating equations into manageable steps.

The name comes directly from Steve Chow's signature visual teaching style, where he holds and simultaneously writes with a black marker and a red marker. The black marker is typically used for the primary problem-solving steps, while the red marker highlights substitutions or secondary operations. This technique helps students clearly track the logical flow of complex derivations.

While he is famous for calculus tutorials, such as integration by parts and finding the derivative of e^x^x, his content spans far beyond it. He frequently tackles infinite series, differential equations, and linear algebra. He is also well known for his "100 Series" videos, where he solves 100 integrals or derivatives in a single continuous session.

While the channel is an incredible supplemental resource for university students, it is designed for enrichment and specific problem-solving rather than serving as a full standalone curriculum. Steve Chow covers specific textbook problems and theoretical concepts that align with Calculus 1, 2, and 3. Students should still rely on their official coursework and university lectures for comprehensive grading and structure.