Astronomy Club: Bunny's Clues!
Charms Club: Charms Search
Daily Prophet: May Activity
Daily Prophet: May Submission Points
Defense Against the Dark Arts: Banner Challenge
Diagon Alley: May Points Bought
Divination Club: Divination Forms
Flourish: Shop Points May
Gryffindor: Top Sorters May Week#1
Gryffindor: Top Sorters May Week#2
Gryffindor: Top Sorters May Week#3
Gryffindor: Top Sorters May Week#4
Herbology Club: Code-Breaking Puzzle
Hogwarts Icons: May Week#4
Hufflepuff: Monthly Contest
Hufflepuff: Text and Image Contest
Hufflepuff: Top Sorters May Week#4
Insomniacs: Insomniac of the Month
Insomniacs: Monthly Contest #2
Insomniacs: Weekly Scavenger Hunt #4
Music Club: Caption Contest
Platform 9 3/4: Sorting May Week#4
Potions Club: Create a Potion
Potions Club: Potions Anagrams
Ravenclaw: May In-House Contest
Ravenclaw: Top Sorters May Week#4
Sorted Challenge: Challenge #1
Sorted Challenge: Challenge #2
Sugarquill: May Totals
Text Contest Leader: Deathly Hallows Mad Libs
Transfiguration Club: Transfiguration Hurt and Heal Game
Writers Block: May Prompt
See, this is why I get worried about people and submitting points :)