CHICAGO (CBS) — A teacher at Glenbard South High School in Glen Ellyn challenged fellow teachers to a ‘positivity challenge’ by telling students why they matter.

The teachers recorded the challenge, capturing the reactions of the students. Many were touched to be chosen by a teacher, some to the point of tears.

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The teachers told students that they are important, inspiring and appreciate them; that they are the reason the teachers go to work every day. One teacher even wrote each student in her class a note, telling them why they matter.

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Since the video was posted Friday, Jan. 20 it has already received 96 shares and 8,700 views.

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The video closed with, “Here’s to always having someone in your corner, to gladly remind you how much you matter. Stay kind and be positive to each other.”