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The Arithmetic of a Feed

Three short lessons for parents on why a feed is not typical: the long tail, the friendship paradox, and why "trending" is the opposite of normal.

For grown-ups, from what InferForge teaches children at Spark & Anvil.

  1. Lesson 1The long tail
  2. Lesson 2The friendship paradox
  3. Lesson 3Trending is not normal
At the table · Two or more, ages 9 and up

Map the family’s friendships

You'll need: A big sheet of paper, pencils.

  1. Write the first names of six to ten people you all know as dots on the paper.
  2. Draw a line between any two who are friends. Count each person’s lines.
  3. For each person, work out the average number of lines their friends have.
  4. Compare: how many people have fewer friends than their friends do on average?
Where the numbers came from

A little history, and what nobody knows

Your friends’ friends

The sociologist Scott Feld described the friendship paradox in 1991: on average, people’s friends have more friends than they do.

How much it shapes the way people feel online is not settled.

Source: Friendship paradox (Wikipedia)

Your child's ladder · on Spark & Anvil

The same idea at every age

  1. Ages 3–5Not made yet
  2. Ages 6–8Pass It On
  3. Ages 9–14Not made yet
  4. Ages 15–18Why Your Friends Have More Friends

Your child will meet this idea again at every age. The tools and courses here are the part for you.

Everything for a child who loves social media →

Print the guidebook (all lessons + the table activity) →