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I created this Estimate Before You Calculate Poster several years ago when I was teaching trigonometry. We did lots of word problems, and I found that my students were reaching for their calculators without even really thinking about what the problem was wanting.

I decided I wanted to encourage students to “Estimate Before You Calculate.” By this, I meant that students would think about what types of answers would be reasonable before ever punching a single number in their calculators.

For example, if I’m calculating the height of a ladder leaning against a building, a good estimate would be 8 feet. A good estimate could also be 15 feet.

If I get a result of .8 feet or 8000 feet from my calculator, that is a sign that I have likely done something wrong. I might need to check my work or my calculator’s mode.

I made a poster with our “Estimate Before You Calculate” motto, and I hung it above the calculator poster in my classroom.

I designed this Estimate Before You Calculate poster to print on 11 x 17 cardstock, my favorite way to make quick posters for my classroom.

## Free Download of Estimate Before You Calculate Poster

Estimate Before You Calculate Poster (PDF) (1078 downloads)

Estimate Before You Calculate Poster (Editable Publisher File ZIP) (418 downloads)

The font is ChunkFive Roman.

Want more posters for your classroom? Check out my posters page!

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