In which state do you need to pay more to play video games, Hawaii or NY?

Grade level: 4th – 5th grades

Skills: Bar graphs

Related environmental issues: Energy

The price of electricity varies widely from area to area. This is because the type and the price of energy sources each area uses to generate electricity are different. The bar graph below shows the average electricity price for playing video games for 5 hours in seven states in November 2019.

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  1. 1.In which state do you need to pay more than 30 cents to play video games for 5 hours?
  2. It costs about _____ cents more to play video games for 5 hours in Alaska than in Indiana.
  3. Among the seven states, which is the third most expensive state to play video games?


Source: U.S. Energy Information Administration, 2020. Electric Power Monthly

Note: It is using per kW electricity price

Answer keys





The 225 Math Quizzes That Will Make You An Environmental Expert (2019) is available from  (paperback)

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How much recycled newspaper will save a tree?

Grade level: 4th – 5th grades

Skills: Fraction (multiplication/division)

Related environmental issues: Reduce/Reuse/Recycle


PDF version


Recycling paper prevents many trees from being cut down for paper. It is estimated that we can save one tree by recycling a stack of newspaper 3 feet high.

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  1. Sean recycled a stack of newspaper 23 feet high.  How many trees did Sean save by recycling the newspaper? Answers must be fractions in mixed numbers.
  2. To save 13 1/6  trees, a stack of how many feet of newspaper Does Sean need to recycle?  Convertfractions into mixed numbers.
  3. Maya wants to save 18 2/3trees. She gathered newspaper to recycle and made a stack of newspaper 55 feet high.  Did she gather enough newspaper? Explain.


PDF version


Source: Recycle Across America, Recycling facts

Answer keys

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