Click the link below to hear 8Bs beautiful rendition of the Quadratic Formula.
(Please excuse the sub-par camera work)
Wednesday, May 25, 2011
Tuesday, May 10, 2011
Today's Handshake Problem
Click the link below to download todays classwork and homework
Helpful Hints:
-Draw out a model of simpler handshake problems (ex. teams of 4) to look for a pattern
-Organize data in a table
-Focus on identifying the pattern. It's great if you are able to get an equation, but if the equation is a challenge, we can work through it together in class.
Monday, May 9, 2011
Triangular Numbers
Welcome back 8th Graders! I hope you all had a valuable trip to Costa Rica! I am looking forward to hearing all about it when you return!
For those of you who weren't in class today, you have come to the right place to find out what you've missed (and, may I add, how responsible of you checking the blog!).
Today we discussed triangular numbers (numbers that create a particular pattern of triangles), observing the pattern of change in diagrams, generating a table and predicting additional triangular numbers, developing an equation for triangular numbers and finally graphing our equations.
You can download the classwork and homework by clicking on the links below.
Developing the equation was the most challenging part for most students. To help guide your equation, consider the following questions, in the order asked:
a)If you put 2 copies of the same triangle (with a base of n) together to form a rectangle, what are the dimensions of the rectangle (in terms of n)? (You can look at the models Ozelle and Erika developed in the images below)
b)How many square tiles are in the rectangle? How could you calculate the area, in terms of n?
c)How does the area of the rectangle compare to the area of the original triangle?
d)How can you use the equation for the rectangles area (answered in part b) to develop the equation for a triangle?
Tuesday, April 26, 2011
Review Videos from Khan Academy
Watch the videos below for review of topics we have covered in class. Some of the videos build off concepts introduced and go in more depth. The great thing about the video is, if you need to review, pause and rewind a segment
Factoring Quadratic Expressions
Completing the Square
Graphing from Quadratic Equations and Completing the Square Notes
Click the link below to download the notes from Monday and Tuesday.
Topics Include:
-How to determine features of a graph from quadratic equations (4/25)
-How to solve quadratic equations by completing the square (4/26)
As a reminder, our quiz on quadratic equations will be this Thursday, April 28.
If you were absent today, you can download the first part of the review sheet by clicking the link below.
Thursday, April 21, 2011
Quadratic Expressions Notes from the Week
Back by popular request!
Topics include:
-Writing Quadratic expressions in factored and expanded form
-Modeling Quadratic Expressions
-Linking Quadratic Expressions to their Graphs
Friday, January 28, 2011
Using the Pythagorean Theorem
A squared + B squared = C squared
Sounds pretty basic, doesn't it? But as we've found this week the uses for the Pythagorean Theorem are far reaching, from analyzing a baseball diamond, to being able to determine the height of a tree, as long as we know certain key pieces of information.
We will be reviewing all we've investigated in 2011 on Monday, including:
-Interpreting and Estimating Square Numbers
-Finding the Area and Side Lengths of Squares, Triangles, Irregular Polygons
-Finding missing sides of triangles
-Analyzing 30-60-90 triangles
Our Quiz on these topics will be Tuesday February 1st.
If you were absent any day this week, or lost a copy of the homework, you can click the link below to download all this weeks classwork and home. Be sure to also click the link under class notes to review what you missed
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