La notte / le notti?

I'm wondering if the following is correct...

La notte becomes le notti (or is it le notti?), as with la classe, becoming le classi, in the plural?

Also would you say.... Lei ha gli occhi verdi (not verdi?). If this is correct, is it ever appropriate to use verdi?

As well as.... i ragazzi sono divertenti (not divertenti?).

Grazie mille!

le notte, le classe, occhi verde are all wrong

Ciao, Stefano

La notte / le notte? 

I'm wondering if the following is correct...

La notte becomes le notte (or is it le notti?), as with la classe, becoming le classe, in the plural?

Also would you say.... Leah ha gli occhi verde (not verdi?). If this is correct, is it ever appropriate to use verdi?

As well as.... i ragazzi è divertente (not divertenti?).

Grazie mille!

"La notte" becomes "Le notti", "la classe" becomes "le classi". 
Leah ha gli occhi verdi (verdi is the plural form of verde)

I ragazzi "sono divertenti"