A blog about teaching and learning in a maths classroom.

Thursday, 25 November 2010 | 1 Comment

I like teaching *surface area*, I think it’s an interesting topic. Yet, I find kids struggle with the concept. Not understanding the basics of area and then getting over the prior knowledge of solids meaning volume are two aspects that cause some difficulty.

This is how I break down surface area for my low ability Year 8 class.

**Investigate Surface Area using Centicubes (comparing with Volume).**

**From a net, make a solid and find the surface area.**

**Find the surface area by drawing a net and counting squares.**

**Find the surface area from nets where the area of each face is shown.**

**Find the surface area of solids where the area of some faces shown**(e.g. show the front, top and side of a rectangular prism).**Find the surface area of a cube given the length of a single edge.**

**Find the surface area of a rectangular prism given the length of 3 edges.**

**Review area.**- Students draw a 3cm square and find it’s area. Then, draw a diagonal and find the area of the resulting triangle(s).
- Students draw a 4 by 5cm rectangle and find it’s area. Then, draw a diagonal and find the area of the resulting triangle(s).

- Determine a means for finding the area of a triangle.

**Make two triangular prisms.**

**Show**my triangular prism t-shirt box for which I’ve made peel off sides, peel off each side and form the net.

**Complete some exercises**given diagrams of triangular prisms with side lengths.

- Determine the surface area of a Smarties box

- Design a Toblerone box

Surface Area Worksheets
PDF, 479 KB

This work is licensed under a Creative Commons License (?).

Posted in • Lesson Idea • Surface Area • Printable • Worksheet | Short URL: http://mths.co/2047

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**Simon Job** — eleventh year of teaching maths in a public high school in Western Sydney, Australia.

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