Curated OER
Rectangular Coordinate System
Everything you need to understand the rectangular coordinate system is explained in this easy to follow video. Great for elementary to middle schoolers learning about plotting points, graphing, and locating points on a coordinate grid....
Khan Academy
SAT Prep: Test 1 Section 9 Part 3
If it takes a long time to complete the problems on the math SAT, it doesn't matter if they are correct - the problems that are left over will count against the student's score. Sal takes care to show quicker ways to complete problems...
Khan Academy
Test 3 Section 2 Part 5
Both algebra and geometry problems are featured in this SAT practice video. Students who struggle to transition between skills on tests (average mean, then diameters and pi, then positive integers) would benefit from Sal's deft handling...
Brightstorm
3-D Solid Properties
Let's move into the third dimension! Learners explore the vocabulary and notation related to three-dimensional figures. The video covers examples of pyramids, but the vocabulary is universal to all 3-D objects.
Curated OER
What is a Rotation?
Transformations, isn't that geometry? The instructor illustrates how to rotate a shape around a fixed point on a graph, keeping the shape the same size.
Curated OER
What is a Point?
A point is an exact location in space. This tutorial defines the concept of a point as it occurs in graphing, geometry, and algebra. A variety of examples are used to show how important points are and where they'll be seen in the world...
Brightstorm
Parallel and Skew Lines
Parallel lines are often incorrectly defined as lines that do not intersect. The instructor in a concept video explains the difference between parallel and skew lines. He also refers to the correct notation and symbols during the...
Khan Academy
SAT Prep: Test 7 Section 2 Part 2
Test-takers who have a hard time transitioning between math skills will find this video very helpful, as Sal moves quickly through increasingly complicated algebra and geometry problems. Not only are his math techniques top-notch, but...
Curated OER
SAT Prep: Test 4 Section 4 Part 2
Problems 7-11, which involve both geometry and algebra problems, allow students to practice transitioning between skills. Sal takes time to explain the process of each problem so that students will understand the test strategies as well...
Khan Academy
SAT Prep: Test 2 Section 9 Part 3
Carefully reading word problems is a skill that many students neglect due to time constraints or test anxiety, and Sal models how to do so in this video. Both algebra and geometry are featured in problems 10-12 of the practice SAT.
Khan Academy
SAT Prep: Test 3 Section 2 Part 2
Problem number 6 on the practice SAT involves solving for a distance on a line, which Sal does in about 2 minutes. His method of efficiently (and correctly) solving problems is an excellent model for students who tend to panic at the...
Khan Academy
SAT Prep: Test 7 Section 2 Part 1
Sal picks up the pace in this video, going through problems 1-7 on page 774 of The Official SAT Study Guide. Basic algebra, arithmetic, and geometry problems start out this section, allowing students to build up some steam before hitting...
Khan Academy
SAT Prep: Test 8 Section 2 Part 4
Advising students to become comfortable with the 30-60-90 triangles as an SAT prep skill, Sal finishes this review session with a geometry problem, an algebra problem with fractions, slopes, and median numbers. His tips and test-taking...
Khan Academy
SAT Prep: Test 3 Section 4 Part 1
Modeling quick thinking and efficient problem solving, Sal works through the linear equation in problem 1 in just over 30 seconds. This video, which covers problems 1-5 on page 530 of The Official SAT Study Guide, also shows students how...
Khan Academy
SAT Prep: Test 3 Section 8 Part 3
Geometry and algebra are equally represented in this video, which covers problems 10-14 on the practice SAT. As always, Sal is the expert of quick, efficient ways to solve problems - especially helpful for students who have a difficulty...
Khan Academy
SAT Prep: Test 8 Section 5 Part 1
Launching into another practice session from The Official SAT Study Guide (page 855) Sal wastes no time in solving problems 1-6, which involve basic algebra and geometry. He encourages efficient problem solving, noting that on the first...
Khan Academy
SAT Prep: Test 7 Section 5 Part 4
Transitioning between algebra and geometry is no problem for Sal as he deftly solves these practice SAT problems. Mathematicians who have a hard time moving between skill sets will appreciate the way that Sal addresses each new problem...
Khan Academy
SAT Prep: Test 1 Section 3 Part 4
Pushing through to problems 11-12 on page 398 of The Official SAT Study Guide, Sal goes into comprehensive detail on each problem. Problem 11 involves geometry, including the function of pi, and problem 12 involves non-constant slopes....
Curated OER
Word Problem Solving Plan 1
Word problems are a problem no more with this helpful and informative video. Sal demonstrates different ways to solve typical algebraic word problems (and one geometry problem), especially how to translate the word problem into an...
CK-12 Foundation
Area and Perimeter of Rhombuses and Kites: Lesson
Flip the triangles up and create a parallelogram. Using the idea of transformations, the video develops the area formula for rhombi and kites. The segment of an extensive geometry playlist uses the formula to find the areas of different...
CK-12 Foundation
Basic Geometric Definitions: Lesson
Build up the basics of geometry, one point at a time. The segment in an extensive playlist on basic geometry provides the definitions of the essential building blocks of geometry. Using drawings, the video shows examples and descriptions.
Socratica
Pythagorean Theorem Proof
No geometry class is complete without a proof. A short video in the Socratica Geometry playlist covers an algebraic proof of the Pythagorean Theorem. Simplifying an equation with two equivalent expressions for the area of a square leads...
CK-12 Foundation
Using Ratios: Lesson
How do ratios work in geometry? The video answers just this question in order to help your class master an important skill. Using the concept of ratios, this segment in an extensive geometry playlist applies ratio reasoning to...
CK-12 Foundation
Proportions: Lesson
Proportionally, one doesn't see much of cross multiplying in geometry. The portion of extensive playlist on geometry reviews proportions. Using properties of equality, the video shows why cross multiplying works for proportions.
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