First of all, syllable stress in English words often appears to be unpredictable, but there are some fairly regular patterns that do occur.
Here are two to start off:
In compound nouns, the first part - or "first word" - receives the stress, while the second part - or "second word" - is weaker, with falling intonation.
So, one way to demonstrate this is a visual on the whiteboard is to use capital letters.
HOUSEcleaning - HOUSEkeeper
You can also underline the first part.
Another way is to use darker print. Just highlight the text and click on B at the top of the whiteboard, or simply write darker.
In two syllable nouns - ones that are not compound nouns - the first syllable usually receives the stress. There are exceptions, but we can often count on this being so.
Here are some examples.
center, paper, glasses, speaker, winter, plastic, walnut, pepper, number, fire, liar, handle, going, insect, mountan, parrot - and the list can go on.
exception: complaint - the second syllable receives the stress in this word.
I'll come back with more sometime later, but I can't say when that'll be, so stay tuned, and check in every once in a while.