"I opened the curtains to let a better light into the room". Is light a countable noun?
If you're talking about the devices that provide light, it is: "There are 3 lights in this room". The example above is talking about light itself, so it's not.
"Nikolle is always giving us all this homework to do!!!" Is homework a countable noun?
It's not. You can use assignments if you want a plural noun.
What is the singular form of "clothes"?
There isn't any.
TMI, a popular contraction used by english speakers, means "too many informations" or "too much information"?
Too much information (uncountable)
"He always does such a great work, I know you're gonna love him." Is this sentence correct?
No, since work is an uncountable noun.
"We experienced such a great weather yesterday!" Do you see a mistake in that sentence?
Weather is an uncountable noun, it can't be used with a/an
"We can finally see the progress here!" Is progress a countable noun?
It's not. It doesn't a plural version, and it can't be used with a/an
Nouns ending in "ics" are countable.
False. Words like economics, electrodynamics, gymnastics, politics, are uncountable and need a singular verb. Example: politics is exhausting.
Glass is an uncountable noun. True or false?
It depends. Material = uncountable. Container to drink liquids = countable.
Paper is a countable noun. True or false?
It depends. Material = uncountable. A piece of writing = countable.
"Hurry! The police are coming!" Is this sentence right?
Yes. Usually collective nouns like staff, family, use singular verbs. Police is an exception, so is people.
"He gave me one scissors to help with the project" Is there something wrong in this sentence? what is it?
Scissors is always a plural noun. Like pants, glasses, etc. You don't say two/some scissors, either. We say "a pair of"