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Black Pen Red PenOther

by Steve Chow

Who uses, recommends or left Black Pen Red Pen, in their own words: each a verbatim quote with a link to where it was said.

1 person

Grant Sanderson
Mathematician and creator of the 3Blue1Brown YouTube channel and the Manim animation library.
recommended

If you like seeing how to work out integrals in all sorts of crazy ways, boy is this the channel for you. Steven is a math teacher, and the videos have a feeling of being in office hours, honestly working through problems with a very skillful and enthusiastic teacher. Many of the problems covered are the kind you might come across in school, and many or just for fun.

His Recommendations page, "Other places online to explore math", a companion to his book recommendations post. From the Other YouTube channels section; these are individual creators, not the companies the sponsorship footnote refers to.

2020-06-01·3blue1brown.com ↗

Every entry is a verbatim quote and a link to the public post it came from. Nothing is paraphrased. If it is not on record somewhere public, it is not here.

The verdict is what they actually said: loved and liked are explicit; recommended means they told others to get it; uses means they only say they use it; read is a book on their public shelf with no verdict; mixed and disliked are kept too.

A dashed affiliate link, sponsored or their own label means the post disclosed a relationship. It is shown, never hidden.

The shading behind a date shows how dated a recommendation is for its kind of thing.

The shading behind a date shows how dated a recommendation is, for its kind of thing. Fully green is recent. It drains a quarter at a time as the post gets older, and is empty once it reads as dated.

What counts as old depends on the thing. A laptop praised four years ago has been replaced twice; a book loved twenty years ago is probably still loved. The shading is gone after about:

Stripes mean the post carries no date and the date shown is an estimate. No date at all, no shading.