Curated OER
Similar Figures
In this similar figures activity, students solve and complete 4 different problems. First, they write a proportion and substitute. Then, students find the cross products and simplify. Finally, they divide each side to find the value in...
Curated OER
Similar Triangles - Applied Problems
Pupils differentiate between similar and congruent triangles. For this geometry lesson, students identify the angles of triangles using the similarity theorem. They apply concepts of triangles to the real world.
Curated OER
Perplexing Polka Dots
Tell case study story of EMS-induced chlorophyll polka-dots in C-ferns. You will need to be familiar with the experiment, as there are some slides that have only photos, no text and no presenter's notes. By using this presentation,...
Curated OER
Flipping For Math
Seventh graders create a video of different formats to deliver a presentation of a math concept such as square roots, decimals, fractions, and more. For this math presentation lesson plan, 7th graders can plan a rap video, story,...
Curated OER
History's Thermometers
Students explain the concept of paleoclimatological proxies. In this oxygen isotope lesson, students interpret data and make inferences about climate changes in the geologic past.
Curated OER
Making Plastic
Students experiment to create a plastic solution. In this science instructional activity, students use sodium borax and polyvinyl alcohol to create their solution, then identify, discuss, and chart observations on the end product.
CK-12 Foundation
Ck 12: Arithmetic: Proportions Using Cross Products
[Free Registration/Login may be required to access all resource tools.] In this lesson students write proportions and then solve proportions by using cross-products. Students examine guided notes, review guided practice, watch...
CK-12 Foundation
Ck 12: Arithmetic: Proportions Using Cross Products
[Free Registration/Login may be required to access all resource tools.] In this lesson students use cross products to solve proportions and find the value of the missing variable. Students examine guided notes, review guided practice,...
PBS
Pbs Learning Media: Ratio/proportion: Targeted Math Instruction
At the end of this lesson about ratio/proportion, students will be able to recognize and apply ratios and proportions to solve real-life problems and solve for any unknown component.
CK-12 Foundation
Ck 12: Arithmetic: Proportions Using Cross Products
[Free Registration/Login may be required to access all resource tools.] In this lesson students identify proportions by cross multiplying or simplifying ratios. Students examine guided notes, review guided practice, watch instructional...
CK-12 Foundation
Ck 12: Arithmetic: Proportions to Find Base B
[Free Registration/Login may be required to access all resource tools.] In this lesson students use the cross products of proportions to find base b in percent problems. Students examine guided notes, review guided practice, watch...
Math.com
Math.com: Proportions
This lesson explains proportions along with the formula to determine if the ratios are equal. An interactive practice activity is included.
ClassFlow
Class Flow: Proportions
[Free Registration/Login Required] This lesson contains notes and examples for instructing how to solve proportions. Begins with relations to equivalent fractions, and then gets into solving algebraically using cross products. It...
CK-12 Foundation
Ck 12: Arithmetic: Proportions
[Free Registration/Login may be required to access all resource tools.] In this lesson students recognize proportions as a statement of equivalent ratios. Students examine guided notes, review guided practice, watch instructional videos...
Alabama Learning Exchange
Alex: Exploring Similar Figures Using Proportions
In this activity, students will explore the concept of similarity. Students will first simplify ratios, solve proportions using the cross product property, and use properties of proportions to solve real-world problems. Similar polygons...