## Tuesday, March 11, 2014

### Do You Know Why March 14th Is Important?

As the second trimester comes to a close, the sixth grade math class just finished up two very important units that introduced them to the world of algebra! They worked with manipulatives to practice combining like terms when simplifying expressions and used the idea of keeping a scale balanced to understand the importance of keeping an equation balanced. We are now beginning our unit on ratios and rates which will introduce the students to unit rates and even a bit about percents!

The seventh grade math class also just finished up their important units on algebraic concepts as the second trimester comes to a close. Although we may be moving away from a unit titled “Working with Equations,” the students have been reminded that solving equations will now be incorporated into all of their future math units! We have moved onto proportional relationships and already we have been solving proportions using equations! This unit will serve as an introduction to linear relationships - a very important concept in both 8th grade math and Algebra I!

The seventh grade Pre-Algebra class just wrapped up their unit on real numbers and scientific notation and has now moved into the world of geometry! We have been investigating angle relationships when it comes to parallel lines, triangles, and, soon, all polygons. Students have discovered these relationships on their own by drawing figures and measuring angles with a protractor. We will continue with geometry for the next two units as we learn more about two-dimensional and three-dimensional shapes.

The eighth grade math class just completed their unit on linear functions which was spent drawing graphs from equations, writing equations from graphs, and determining slope from equations, graphs, and tables. We’re now continuing to use our knowledge of linear functions to solve systems of equations. We will learn three ways to solve systems – graphing, substitution, and elimination. Solving systems will allow us to solve problems with more than one unknown!

## Algebra I

The Algebra I class recently finished a unit on writing linear equations. They wrote equations from graphs, from a slope and y-intercept, from a slope and point, and from two points. They are now continuing to apply their knowledge of linear equations to solve systems of linear equations. We have already learned to solve systems by graphing and by using substitution and will learn our final way, elimination, this week. We are going to end the unit by playing with some technology that can be used to solve systems.

## Pi Day!

In case you didn't know, a fun math holiday is coming up! March 14th is Pi Day! Pi is the number that you get anytime you divide a circle’s circumference by its diameter. The Greek letter π is used to represent this value. Many times you will hear that π is equal to 3.14, but really the number goes on and on forever with no pattern! We celebrate Pi Day on March 14th (3/14) because 3.14 is the start of Pi. Here are some fun facts about pi and Pi Day!

Pi Day is also Albert Einstein’s birthday – March 14, 1879.

In 1706, William Jones, a mathematician from Wales, selected the Greek letter π to represent the value.

In 2006, Akira Haraguchi set the world record for the most digits of Pi memorized by reciting the first 100,000 digits!