### Steal Like an Artist by Austin Kleon

An excellent thought-provoking book that's fun to look at and to hold. Yes, I'll steal the size of this book for my homeschool travel book, and well, that was one of the points! Austin Kleon who serendipitously came to live in Austin, TX wrote this book of http://austinkleon.com/steal/missives on how to best experience being creative. The book covers more of the how than the what I'd say. Some of the advice Austin offers filtered through my reading:

1. Think of your heros' lives, not just their creative input. Let their lives inform yours.
2. Dress for the job you want. Keep being a kid, keep pretending.
3. Get bigger pockets if you need to but keep a journal(s) on you at all times.
4. Who influenced the people who influence you?
4.a. Who does influence you anyway?
6. Everything that needs to be said has been, but no one listened.
6.a. Say it again.
7. Write not what you know, but what you like to read.
8. Touch your work. Rearrange it. Tape it to the wall.
9. Tune out while you experience the world. Take the bus. Keep your head up.
10. Keep a log book. Ask yourself what's the best thing that happened to you today?

All of it's so, so good!

No. 1 our 6 y.o. demonstrates how to tape your work to the wall! (And some of Leroy Neiman's).

### Cool Math Tricks: Deriving the Divergence, (Del or Nabla) into New (Cylindrical) Coordinate Systems

Now available as a Kindle ebook for 99 cents! Get a spiffy ebook, and fund more physics
The following is a pretty lengthy procedure, but converting the divergence, (nabla, del) operator between coordinate systems comes up pretty often. While there are tables for converting between common coordinate systems, there seem to be fewer explanations of the procedure for deriving the conversion, so here goes!

What do we actually want?

To convert the Cartesian nabla

to the nabla for another coordinate system, say… cylindrical coordinates.

What we’ll need:

1. The Cartesian Nabla:

2. A set of equations relating the Cartesian coordinates to cylindrical coordinates:

3. A set of equations relating the Cartesian basis vectors to the basis vectors of the new coordinate system:

How to do it:

Use the chain rule for differentiation to convert the derivatives with respect to the Cartesian variables to derivatives with respect to the cylindrical variables.

The chain rule can be used to convert a differe…

### Division: Distributing the Work

Our unschooling math comes in bits and pieces.  The oldest kid here, seven year-old No. 1 loves math problems, so math moves along pretty fast for her.  Here’s how she arrived at the distributive property recently.  Tldr; it came about only because she needed it.
“Give me a math problem!” No. 1 asked Mom-person.

“OK, what’s 18 divided by 2?  But, you’re going to have to do it as you walk.  You and Dad need to head out.”

And so, No. 1 and I found ourselves headed out on our mini-adventure with a new math problem to discuss.

One looked at the ceiling of the library lost in thought as we walked.  She glanced down at her fingers for a moment.  “Is it six?”

“I don’t know, let’s see,” I hedged.  “What’s two times six?  Is it eighteen?”

One looked at me hopefully heading back into her mental math.

I needed to visit the restroom before we left, so I hurried her calculation along.  “What’s two times five?”

I got a grin, and another look indicating she was thinking about that one.

I flashed eac…