Mean Boys by lhanzetwrites (book one: A boy changes my life)

Heather Tempter is a fourth grader who dislikes the fact that she's a girl sometimes, hates boys,
and has a sister that really gets her nerves.

Now that she has been accepted to a new school in Colorado, Marigold Elementary School..

When Heather meets friends, she accidentally messed with the popular kid of the whole fourth grade-

Spencer Richard Anderson, a spoiled rich kid that cannot resist the fact that he has to deal with Heather.
As Spencer ruins her life, Heather gets out her own claws.

See what will happen in the first book of Mean Boys.

~lhanzetwrites