TeachEngineering
Teach Engineering: A Spectral Mystery
Students use the spectrograph from the "Building a Fancy Spectrograph" activity to gather data about light sources. Using their data, they make comparisons between different light sources and make conjectures about the composition of a...
Annenberg Foundation
Annenberg Learner: Geometry: Circles: Inscribed Angles
Study inscribed angles in semicircles and quarter-circles. What conjectures can you make about the measure of an inscribed angle in semi- or quarter-circles?
Texas Education Agency
Texas Gateway: Connecting Postulates, Definitions, and Theorems
The student will distinguish the difference between undefined terms, definitions, postulates, conjectures, and theorems.
Shodor Education Foundation
Shodor Interactivate: Lesson: Ideas That Lead to Probability
This lesson plan sets the ground work for an introduction to and then exploring the concepts that are the foundation for probability. Lots of resources are available for teachers and learners at this website.
Shodor Education Foundation
Shodor Interactivate: Lesson: Conditional and Simultaneous Probability
This lesson plan deals with conditional probability and the probability of simultaneous events. Problems included in this lesson tend to have solutions that are counterintuitive. This presents an opportunity to investigate more deeply...
Wolfram Research
Wolfram Math World: Rectangle
MathWorld provides the definition of a rectangle and the area formula of a rectangle.
Other
Patterns of Evidence: Hanging Gardens of Babylon Made by Biblical King?
The author of this blog entry discusses the theory that the Hanging Gardens of Babylon mentioned in the Bible and generally attributed to King Nebuchadnezzar of Babylon may have actually been built by King Sennacherib of Assyria at his...
Wikimedia
Wikipedia: Theorem
Wikipedia offers a detailed description of a theorem, or a statement that can be proven true. Includes many terms related to theorems, also.
Varsity Tutors
Varsity Tutors: Hotmath: Graphing Calculator Practice Problems: Logic and Proof
Practice using your graphing calculator for logic and proof problems. If you get stumped or if you would like to check your work, then select the View Solution button, which is located directly under each problem.
CK-12 Foundation
Ck 12: Geometry: Types of Reasoning Study Guide
[Free Registration/Login may be required to access all resource tools.] Reasoning is a fundamental part of geometric proofs. There are several types of reasoning, many of which we innately and naturally picked up. However, the different...
Sophia Learning
Sophia: Counterexamples: Lesson 7
This lesson will help a learner understand counterexamples. It is 7 of 7 in the series titled "Counterexamples."
National Council of Teachers of Mathematics
The Math Forum: How Do You Find Prime Numbers?
This site explains prime number theory and how to find prime numbers.
Curated OER
Educational Technology Clearinghouse: Maps Etc: Austria Hungary, 1920
A map of Austria-Hungary in 1920, showing railroads, canals, and submarine telegraph lines. This map shows the partition of the Austro-Hungarian territories after WWI, showing the new boundaries established by the Treaty of Saint...
Curated OER
Educational Technology Clearinghouse: Maps Etc: Austria Hungary, 1920
A map of Austria-Hungary in 1920, showing railroads, canals, and submarine telegraph lines. This map shows the partition of the Austro-Hungarian territories after WWI, showing the new boundaries established by the Treaty of Saint...
Curated OER
Educational Technology Clearinghouse: Maps Etc: Austria and Hungary, 1920
A map of the former Austria-Hungary after the Treaty of Versailles following WWI, showing pre-war and post-war boundary changes. The map shows the new boundaries of Czechoslovakia and Jugoslavia, the losses to Poland, Ukraine, Romania,...
Curated OER
Etc: Maps Etc: Russia in Europe and Caucasia, 1920
A map of European Russia and the Caucasia at the end of World War I, showing province boundaries at the time, and the conjectural boundaries of the new states at the time the map was made given in red outline. These new states include...
Curated OER
Educational Technology Clearinghouse: Clip Art Etc: Beni Hassan
Among the figures painted in the very ancient tomb at Beni Hassan, in Egypt, occurs a group of figures from which the annexed woodcut has been drawn, conjectured to represent the arrival of Joseph's brethren when they went to purchase...
Science Education Resource Center at Carleton College
Serc: Seeing and Describing the Predictable Pattern: The Central Limit Theorem
A learning activity where students are guided into discovering the Central Limit Theorem. As they explore sampling distributions, they will identify predictable patterns which can be described with this mathematical theorem. Handouts for...
Science Education Resource Center at Carleton College
Serc: Reasoning About Center and Spread: How Do Students Spend Their Time?
Using their own habits for data, students predict how much time they spend on different activities each day, and how much variability each activity is likely to have. They then collect data into a class spreadsheet and look at the...
Science Education Resource Center at Carleton College
Serc: An in Class Experiment to Estimate Binomial Probabilities
This hands-on activity is appropriate for a lab or discussion section for an introductory statistics class, with 8 to 40 students. Each student performs a binomial experiment and computes a confidence interval for the true binomial...
Science Education Resource Center at Carleton College
Serc: Independent Samples T Test: Chips Ahoy vs. Supermarket Brand
A hands-on investigation where students count the number of chips in cookies in order to carry out an independent samples t-test to see if Chips Ahoy brand cookies have a higher, lower, or different mean number of chips per cookie than a...
Science Education Resource Center at Carleton College
Serc: Using Your Hair to Understand Descriptive Statistics
Enhance students' understanding of various descriptive measures with a visual interpretation of a mean, median, outlier, and the concept of distance-to-mean.
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