Your device is currently offline. You can view downloaded files in My Downloads.

Lesson Plan

Determine a cube's edge length when given the surface area by using division and algebraic reasoning

teaches Common Core State Standards CCSS.Math.Content.6.EE.A.2c
teaches Common Core State Standards CCSS.Math.Content.6.G.A.4
teaches Common Core State Standards CCSS.Math.Practice.MP2
teaches Common Core State Standards CCSS.Math.Practice.MP6
teaches Common Core State Standards CCSS.Math.Practice.MP7
Quick Assign

You have saved this lesson!

Here's where you can access your saved items.


Card of

or to view additional materials

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson.

Big Ideas: Given the surface area of a cube, its edge length can be determined using algebraic reasoning with the formula S.A. = 6s^2. Formulas for finding volume use variables for which measurements can be substituted. This lesson builds on students' work finding the surface area of cubes using the formula S.A. = 6s^2. This task requires students to use division and algebraic reasoning to find the edge lengths of various cubes when given the surface area. Students explore how to rewrite S.A. = 6s^2 as S.A. / 6 = s^2; they will use their understanding of square numbers (whole-number factors, not exceeding 12 x 12) to find the side length. This lesson develops algebraic reasoning, introduces the need for finding square roots, and connects to finding surface area of more complex figures in 7th grade. Vocabulary: 2-dimensional shape, 3-dimensional figure, area, cube, cubic units, edge, edge length, exponent, formula, side, side length, square units, surface area, volume
Provide feedback