359: Lines and Diagonals

There's sequences all over the place. What are they?

Does your sequence predict the 20th case?

And the 11th and 12th?

358: Division and Remainders

Is that diagram correct?

What if the question were 13 ÷ 5 = 2 R3? Could we diagram it in the same way?

357: Box Office Receipts for The Interview.

"Sony doesn't say" .... but do we have enough information to tell anyway?

‘The Interview’ Brings In $15 Million on Web 
LOS ANGELES —
“The Interview” generated roughly $15 million in online sales and rentals during its first four days of availability, Sony Pictures said on Sunday.

Sony did not say how much of that total represented $6 digital rentals versus $15 sales. The studio said there were about two million transactions over all. 

source. @ddmeyer

356: Partridge in a Number Tree

You know the song. "And a Partridge in a Pear tree." What patterns of numbers can we find here?

The first partridge.

If you look at the total gifts each day, what sequence of numbers is this?

Four Calling Birds, calling out numbers ...

How many different ways are there to find the total number of gifts given over the twelve days?

355: Millionaire

Would you guess? $250,000 if correct and $100,000 if she refuses to try for it.

354: How to Teach Division

So, students. You've had a chance to weigh in on addition and multiplication.

What is the best way to do division?

353: How to Teach Multiplication

There are several ways to teach multiplication. Many people seem to feel that students know best how they learn, so I'm asking students to weigh in on this particular issue.

Which method is best? Is there a difference between what we should be doing with elementary students and with high school students? With how much and with what do students need to graduate high school and enter the RealWorld?

Hindu Lattice Method	Grid Method
Standard Algorithm	Japanese Sticks