OER Commons
Oer Commons (Open Educational Resources)
OER Commons is a network of resources that have been shared by many different schools, instructors and institutions - and it is all free for you to use! Browse the courses or lesson plans for topics ranging from mathematics to humanities.
OER Commons
Oer Commons: Mars: Proving the Pythagorean Theorem
This lesson is intended to help you assess how well learners are able to produce and evaluate geometrical proofs. PowerPoint slides are included with the lesson.
OER Commons
Oer Commons: Introduction to Ratio Tables
Seventh graders use ratio cards to find equivalencies and form partnerships for the week. As a class, 7th graders discuss and decide on classroom norms. Give each student a ratio card. Instruct students to find a classmate whose card has...
OER Commons
Oer Commons: Scale
Seventh graders will explore scale and use it to find measurements in scale drawings.
OER Commons
Oer Commons: Understanding Rational Numbers
Seventh graders learn the definition of rational number, and they write rational numbers as ratios of integers and as repeating or terminating decimals.
OER Commons
Oer Commons: Measuring Circles
Seventh graders will measure the circumference and diameter of round things in the classroom and discover the ratio pi. They will see that the ratio of a circle's circumference to its diameter can be used to solve for the circumference...
OER Commons
Oer Commons: Simplifying Numerical Expressions
Seventh graders use the distributive property to rewrite and solve multiplication problems. Then they apply addition and multiplication properties to simplify numerical expressions.
OER Commons
Oer Commons: Fundamental Counting Principle
Students will continue to apply their understanding of compound independent events. They will calculate probabilities and represent sample spaces with visual representations.
OER Commons
Oer Commons: Experimental Probability
Learners will extend their understanding of probability by continuing to conduct experiments, this time with four-colored spinners. They will compare experimental results to expected results by first conducting an experiment, then...
OER Commons
Oer Commons: Surface Area of Prisms
Students will extend their knowledge of surface area and nets of rectangular prisms to generalize a formula for the surface area of any prism.
OER Commons
Oer Commons: Area of a Circle
Seventh graders will compare the formula for the area of a regular polygon to discover the formula for the area of a circle.
OER Commons
Oer Commons: Polygons
Seventh graders find the area of regular polygons, recalling what they already know about the area of geometric shapes and generalizing a formula for any regular polygon.
OER Commons
Oer Commons: Calculating the Unit Rate of a Ratio Situation
Seventh graders find the unit rate of a ratio situation.
OER Commons
Oer Commons: Multiplication Properties of Equality
Seventh graders use the multiplication property of equality to justify their solution to a ratio problem.
OER Commons
Oer Commons: Understanding Distance & Coordinates
Seventh graders find the distance between points on a number line by counting and by using subtraction. They then use subtraction to find differences in temperatures. Students discover that the distance between any two points on the...
OER Commons
Oer Commons: Compound Events & Sample Spaces
Seventh graders begin learning about compound events by considering independent events. They will consider everyday objects with known probabilities. Students will represent sample spaces using lists, tables, and tree diagrams in order...
OER Commons
Oer Commons: Exploring Cross Sections
Students will explore the cross-sections that result when a plane cuts through a rectangular prism or pyramid. Students will also see examples of cross-section cuts in real-world situations.
OER Commons
Oer Commons: Calculating Volume
Seventh graders will extend their knowledge of volume to find the volume of right prisms, seeing that the volume is the area of the base multiplied by the height.
OER Commons
Oer Commons: Reviewing the Properties of Multiplication
Seventh graders use properties of multiplication to prove that the product of any two negative numbers is positive and the product of a positive number and a negative number is negative.
OER Commons
Oer Commons: Reviewing the Properties of Addition
Middle schoolers review the properties of addition and write an example for each. Then they apply the properties to simplify numerical expressions.
OER Commons
Oer Commons: 100th Day of School
tudents will bee able to celebrate the 100th day of school by bringing in a project representing it. They will also fill out a chart that has 100 blank squares for them to fill in.
OER Commons
Oer Commons: Understanding Fractions & Decimals
Seventh graders use number lines to solve addition and subtraction problems involving positive and negative fractions and decimals.
OER Commons
Oer Commons: Model Integer Addition
In this OER Commons resource students will use the Hot Air Balloon interactive to model integer addition. They then move to modeling addition on horizontal number lines. They look for patterns in their work and their answers to...
OER Commons
Oer Commons: The Effects of Positive & Negative Numbers
Seventh graders explore what happens to a hot air balloon when they add or remove units of weight or heat. This activity is an informal exploration of addition and subtraction with positive and negative integers.