Curated OER
Congruent Triangles Postulates
Students discover three lettered postulates that prove triangles congruent.
Curated OER
Fractions
Fourth graders explore fractions. They use Skittles and M&M's to practice adding and subtracting fractions. Students review the numerator and the denominator of fractions. They count the number of each color of Skittles and M&M's...
Curated OER
Navy Sail Design
Students use the Pythagorean Theorem to explore sailboat design. In this Pythagorean Theorem lesson, two sides of a triangular sail are measured, and the theorem is used to calculate the third side. A worksheet, bulletin board design,...
Curated OER
Cruising the Internet
Students identify the parts of an engine using a graph. In this statistics lesson, students make a graph from their collected data. They calculate the volume of a cylinder using a line of regression and a scatter plot.
Curated OER
Making Shapes
Tenth graders construct geometric figures using compasses and protractors.
Curated OER
Magic Mountain Coaster Computation
Learners use the Internet to do research on the roller coasters at Magic Mountain Amusement Park. They must use mathematical formulas to calculate the highest and fastest coaster at the park.
Curated OER
Circle the Earth - Explore Surface Types on a Journey around Earth
Students use CERES percent coverage surface data with a world map in locating landmasses and bodies of water at Earth's Equator.
Other
Nz Maths Problem Solving Lesson Plans: Level 2
NZMaths is a New Zealand teacher resource that provides lesson plans for learners in algebra, geometry, measurement, numbers, statistics, logic and reasoning.
Other
Nz Maths Problem Solving Lesson Plans: Level 5
Teachers, this New Zealand Problem Solving website is an outstanding resource for lesson plans. They are organized into the following categories: algebra, geometry, measurement, numbers, statistics, and logic and reasoning.
Other
Nz Maths Problem Solving Lesson Plans: Level 6
Teachers, this New Zealand Problem Solving website is an outstanding resource for lesson plans. They are organized into the following categories: Algebra, Geometry, Measurement, Numbers, Statistics, and Logic and Reasoning.
Maths Challenge
Maths challenge.net: Right Angle Reasoning
A geometry problem for students to use their mathematical reasoning skills to explain a right triangle property.
Other
Nz Maths: Problem Solving Lesson Plans: Level 3 Problems
This New Zealand Problems website is an excellent resource for lesson plans in problem-solving. They are organized into the following categories: algebra, geometry, measurement, numbers, statistics, and logic and reasoning.
Other
Nz Maths Problem Solving Lesson Plans: Level 4
This New Zealand Problem Solving website is an outstanding resource for lesson plans. They are organized into the following categories: algebra, geometry, measurement, numbers, statistics, and logic and reasoning.
CK-12 Foundation
Ck 12: Geometry: Indirect Proof in Algebra and Geometry
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to write an indirect proof and provides examples of indirect proofs in Algebra and Geometry.
Other
Nz Maths Problem Solving Lesson Plans: Level 1
NZMaths, a New Zealand teacher resource, provides lesson plans for learners in algebra, geometry, measurement, numbers, statistics, logic and reasoning.
CK-12 Foundation
Ck 12: Geometry: Deductive Reasoning
[Free Registration/Login may be required to access all resource tools.] In this lesson students use deductive reasoning to solve problems. Students examine guided notes, review guided practice, watch instructional videos and attempt...
CK-12 Foundation
Ck 12: Geometry: Deductive Reasoning
[Free Registration/Login may be required to access all resource tools.] This concept introduces students to deductive reasoning using the laws of detachment, contrapositive, and syllogism. Students examine guided notes, review guided...
Math Planet
Math Planet: Geometry: Proofs Using Algebra
Examples and a video lesson help to explain proofs and logic. [1:57]
Oswego City School District
Regents Exam Prep Center: Logic
Understanding mathematical language in problem solving can be a difficult concept to grasp. Sharpen your logical reasoning skills at this test prep site that explains the terms: if, and, or, implies, and only if, as they relate to math....
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Logic and Proof Exercises
Twenty-five problems cover the topic of logic and proof in different geometry settings. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View Solution"...
McGraw Hill
Glencoe Mathematics: Self Check Quiz on Reasoning & Proof
The online assessment demonstrates knowledge of concepts utilized in Geometry. The multiple choice questions test students on mathematical reasoning and proof.
University of Toronto (Canada)
Question Corner: Deductive and Inductive Reasoning
A simple discussion of the differences between inductive and deductive reasoning. Helpful to anyone who is having difficulty differentiating between the two.
Oswego City School District
Regents Exam Prep Center: Types of Sentences
What is "Logic"? What is a "Mathematical sentence"? This website provides definitions of both of these terms and defines examples of mathematical sentences ("open sentence" and "closed sentence") and provides examples of each. Use the...
Maths Challenge
Maths challenge.net: Painted Faces
Mathchallenge offers this mathematical reasoning problem, a one star problem requiring nothing more than a logical mind and paper and pencil, to deduct the painted faces problem