EngageNY
More About Similar Triangles
Determine whether two triangles are similar. The lesson presents opportunities for pupils to find the criterion needed to show that two triangles are similar. Scholars use the definition of similarity to find any missing side...
EngageNY
Similarity
Use the coordinate plane to show two figures are similar. The lesson incorporates congruence transformations and dilations to move a figure on to another figure. Pupils determine that if a similarity transformation exists between two...
EngageNY
End-of-Module Assessment Task - Grade 8 Mathematics (Module 3)
Everything the class knows about similarity in one small package. The last portion of a 16-part series is a three-question assessment. In it, pupils demonstrate their application of similar figures and their associated transformations.
EngageNY
Dilations on the Coordinate Plane
Dilations from the origin have a multiplicative effect on the coordinates of a point. Pupils use the method of finding the image of a point on a ray after a dilation to find a short cut. Classmates determine the short cut of being able...
EngageNY
First Consequences of FTS
Challenge the young mathematicians to find the exact coordinates of a dilated point. The fifth segment in a 16-part series introduces the class to the converse of the Fundamental Theorem of Similarity. Scholars use the theorem to find...
EngageNY
Examples of Dilations
Does it matter how many points to dilate? The resource presents problems of dilating curved figures. Class members find out that not only do they need to dilate several points but the points need to be distributed about the entire curve...
EngageNY
Properties of Dilations
Investigate dilations to learn more about them. The second segment in a series of 16 provides a discussion of properties of dilations by going through examples. The problem set provides opportunities for scholars to construct dilations.
Curated OER
NFL Home Field Advantage?
Does the home team have the home field advantage in football? Class members look at a graph that displays wins at home and wins on the road for each NFL team from 2002–2012. Then they answer eight word problems that look at the...
Messenger Education
Mission: Possible—How Can We Plan an Exploration of Another World?
An astronaut's spacesuit weighs 280 pounds and takes 45 minutes to put on — that's a serious suit! The second activity of a three-part series allows pupils to see all that goes into space exploration. Through simulations, groups analyze...
Yummy Math
Should NFL Quarterbacks Shave or Grow a Beard?
What does facial hair have to do with quarterback ratings? Using a set of data that provides QBR with and without facial hair, football enthusiasts determine if performance is affected. It also has learners question if the relationship...
EngageNY
The Graph of a Linear Equation in Two Variables
Add more points on the graph ... and it still remains a line! The 13th installment in a series of 33 leads the class to the understanding that the graph of linear equation is a line. Pupils find several solutions to a two-variable linear...
EngageNY
An Application of Linear Equations
Just how far will the Facebook post go? Lead a discussion on how to manipulate the sum of a geometric series to figure out a formula to find the sum at any step. The plan contains an alternative to the discussion with more accessible...
EngageNY
Linear and Nonlinear Expressions in x
Linear or not linear — that is the question. The lesson plan has class members translate descriptions into algebraic expressions. They take the written expressions and determine whether they are linear or nonlinear based upon the...
EngageNY
Mid-Module Assessment Task: Grade 8 Module 3
How well does the class understand dilations? The three-part assessment presents problems related to the properties of dilations. Pupils perform dilations and determine whether a dilation is responsible for a specific image.
EngageNY
Modeling Using Similarity
How do you find the lengths of items that cannot be directly measured? The 13th installment in a series of 16 has pupils use the similarity content learned in an earlier resource to solve real-world problems. Class members determine...
EngageNY
Basic Properties of Similarity
Does the symmetry and transitive property apply to similarity? The 10th segment in a series of 16 presents the class with a group of explorations. The explorations have pairs show that similarity is both symmetrical and transitive. It...
EngageNY
Informal Proofs of Properties of Dilations
Challenge the class to prove that the dilation properties always hold. The lesson develops an informal proof of the properties of dilations through a discussion. Two of the proofs are verified with each class member performing the...
EngageNY
Fundamental Theorem of Similarity (FTS)
How do dilated line segments relate? Lead the class in an activity to determine the relationship between line segments and their dilated images. In the fourth section in a unit of 16, pupils discover the dilated line segments are...
EngageNY
What Lies Behind “Same Shape”?
Develop a more precise definition of similar. The lesson begins with an informal definition of similar figures and develops the need to be more precise. The class learns about dilations and uses that knowledge to arrive at a mathematical...
Messenger Education
Look But Don’t Touch—Exploration with Remote Sensing
Mars is home to the tallest mountain in our solar system, Olympus Mons. In this set of two activities, learners review geologic land formations through the analysis of aerial maps. They then apply this knowledge to aerial maps of objects...
Davis School District
Computer Parts
What is inside a computer? Give your budding computer scientists a worksheet that has them label parts of a computer. They use a link included on the sheet to label basic input/output systems, video cards, drives, case fan, and more....
Freeology
Martin Luther King, Jr.'s "I Have a Dream"
Dr. Martin Luther King, Jr.'s speech "I Have A Dream" is hailed as one of the most eloquent and moving speeches of the 20th century. But what makes his words hit his listeners' ears in just the right ways? Young orators study Dr. King's...
TryEngineering
Solving a Simple Maze
Solve a maze ... from a robot's point of view. In the instructional activity, your scholars build a small, simple maze from cardboard and then find a route from the start point to the finish point. They write an algorithmic process that...
TryEngineering
Fun with Sorting
Who knew sorting could be so much fun? Scholars participate in a sorting activity where they develop questions to place a list of numbers in order. They consider how these questions can be used as an algorithm.