This is a general collection of math resources. It is a large collection, but you can use the fliters on the left side of the screen to filter down to the specific education level you are looking for. (You are encouraged to filter by education level, not grade.)
This short video and interactive assessment activity is designed to give fourth graders an overview of - hundredths.
This short video and interactive assessment activity is designed to teach first graders an overview of subtraction (numbers to 100).
This video lecture serves as a review of subtraction up to the number twenty for first graders.
This short video and interactive assessment activity is designed to teach second graders an overview of telling time to 1-minute intervals.
This short video and interactive assessment activity is designed to teach first graders an overview of telling time to quarter and hour.
This short video and interactive assessment activity is designed to give fourth graders an overview of - tenths.
This site offers math videos for students in the following areas:
Counting and Cardinality
Operations & Algebraic Thinking
Number & Operations in Base Ten
Geometry
Measurement & Data
Number & Operations—Fractions
Ratios & Proportional Systems
Statistics & Probability
The Number System
Expressions & Equations
Functions
Today we're going to talk about p-hacking (also called data dredging or data fishing). P-hacking is when data is analyzed to find patterns that produce statistically significant results, even if there really isn't an underlying effect, and it has become a huge problem in science since many scientific theories rely on p-values as proof of their existence! Today, we're going to talk about a few ways researchers have "hacked" their data, and give you some tips for identifying and avoiding these types of problems when you encounter stats in your own lives.
Last week we introduced p-values as a way to set a predetermined cutoff when testing if something seems unusual enough to reject our null hypothesis - that they are the same. But today we’re going to discuss some problems with the logic of p-values, how they are commonly misinterpreted, how p-values don’t give us exactly what we want to know, and how that cutoff is arbitrary - and arguably not stringent enough in some scenarios.
The purpose of this task is to provide students an opportunity to use mathematics addressed in different standards in the same problem.
The purpose of this task is for students to find the answer to a question in context that can be represented by fraction multiplication. This task is appropriate for either instruction or assessment depending on how it is used and where students are in their understanding of fraction multiplication.
The purpose of this task is to provide students with a situation in which it is natural for them to divide a unit fraction by a non-zero whole number.
This high level task is an example of applying geometric methods to solve design problems and satisfy physical constraints. This task is accessible to all students. In this task, a typographic grid system serves as the background for a standard paper clip.
A parabola is a u-shaped curve that arises not only in the field of mathematics, but also in many other fields such as physics and engineering.
This task assumes students have an understanding of the relationship between functions and equations. Using this knowledge, the students are prompted to try to solve equations in order to find the inverse of a function given in equation form: when no such solution is possible, this means that the function does not have an inverse.
Solar Dishes such as the one shown use a parabolic shape to focus the incoming light into a single collector.
LessonIntroduction
-students will be handed out a review sheet on measuring angles, perpendicular lines, parallel lines and angle bisectors. (10 mins)
Body
-Students will be instructed to use popsicle sticks and marshmallows to construct a building. They are to ensure that some walls will be perpendicular to each other as well as parallel along with the roof. An expectation is that the building will be symmetrical and all angles on each side will be equal to the other side. (30 mins)
Students act as civil engineers developing safe railways as a way to strengthen their understanding of parallel and intersecting lines. Using pieces of yarn to visually represent line segments, students lay down "train tracks" on a carpeted floor, and make guesses as to whether these segments are arranged in parallel or non-parallel fashion. Students then test their tracks by running two LEGO® MINDSTORMS® NXT robots to observe the consequences of their track designs, and make safety improvements. Robots on intersecting courses face imminent collision, while robots on parallel courses travel safely.
An interactive applet and associated web page that demonstrate the concept of parallel lines. The applet shows two lines, one of which has draggable endpoints. As the line is changed by dragging them, the other line changes to remain parallel to it. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.
An interactive applet and associated web page that demonstrate the properties of parallel lines in coordinate geometry. The applet presents two lines, each defined by a pair of draggable points. If they are parallel the slopes are the same and the applet adds the parallel arrow marks to them. The slope of each line is continuously recalculated and the case of vertical lines (with undefined slope) is handled correctly. The is a software 'detent' that snaps the lines to parallel if they are close to it. The grid, axis pointers and coordinates can be turned on and off. The slope calculation can be turned off to permit class exercises and then turned back on the verify the answers. The applet can be printed as it appears on the screen to make handouts. The web page has a full description of the method for determining if lines are parallel, a worked example and has links to other pages relating to coordinate geometry. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.