# Daily Challenge 09/21/2017

What scientific principle is being demonstrated?

Aired: September 12, 2016

In this clip from Homework Hotline Donna Mineo shows you how to find...... more

Aired: January 23, 2015

In this clip, Joe helps us solve a problem with fractions and whole...... more

Aired: November 7, 2014

In this clip, Mr. Z. helps us add up some fractions, using the Lowest...... more

Aired: September 12, 2014

Donna Mineo helps a student solve a fraction problem using a number...... more

Aired: March 28, 2014

In this clip from Homework Hotline, Craig Zaremba shows us a trick to...... more

Aired: February 7, 2014

Laura Drake helps us find equivalent fractions, in this clip from...... more

Aired: January 17, 2014

Ed Hathaway helps us solve a word problem involving fractions in this...... more

Aired: January 10, 2014

Craig Zaremba helps us solve a word problem in this clip from Homework...... more

Aired: November 22, 2013

Ed Hathaway helps us understand Order of Operations in this clip from...... more

Aired: September 9, 2013

In this video John Walker shows you how to solve order of operations...... more