Please answer the following question by reasoning step-by-step.
There are 15 students in the art club. By the end of each quarter, each student makes two artworks. If there are four quarters in a school year, how many artworks can the art club collect in two school years?

240
15 x 2 = 30 artworks can be collected in one quarter.

So in one school year, a total of 30 x 4 = 120 artworks can be collected.

Therefore, 120 x 2 = 240 artworks can be collected in two school years.

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The answer: 240