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A
B
C
D
1
Terry Boot
Two sickles
Anthony Goldstein
Legilimency
The place where the first DA-meeting was held is in B3. If there are any teachers, they are all in the same row.
Hog's Head is between a patronus and a male Hufflepuff prefect.
Go put the spell to D3 if you haven't already.
You'll find a substitute Care of Magical Creatures teacher somewhere here.
2
Wilhelmina Grubbly-Plank
Mad-Eye
Dolores Umbridge
The Disillusionment Charm
There are only Hufflepuff and Ravenclaw Prefects here, both male.
Which is the badge in B4 that Ron got before school started?
You'll find somewhere a charm that disguised a target as its surroundings by making it take on the exact colour of its environment, effectively turning it into a chameleon.
Muggles may have called D1 "mind-reading", but really it's an act of navigating through a person's mind.
3
Stag
Hog's Head
Ernie MacMillan
Protean Charm
The teacher in B2 was threatening Vernon when the Dursleys came to pick Harry up from the train.
Harry used the object in A4 to inform everyone about the next DA-meeting. There is a Prefect in the first row.
C2 sent the dementros after Harry.
C4 works against D1. There is a charm next to Dolores.
4
Galleon
Prefect's badge
Occlumency
Neville Longbottom
The spell in D3 Hermione used on the coins to mimic Harry's coin is below the other charm. Bellatrix used cruciatus curse to person in D4 in the Department of Mysteries.
"Oh, Ron, how wonderful! That's everyone in the family!" ... "What are Fred and I, next-door neighbours?"
A3 belongs to Harry.
B1 is the amount one butterbeer costs at the Hog's Head. The two prefects are on the same columns.