The short answer
Say which grade and subject, what you have already tried, and what you actually need to happen. Post in the forum that matches the topic, and give the question a title that describes the problem rather than announcing that you have one.
A vague question gets a vague answer, and then two more days go by. A few small habits get you a proper answer the first time.
Put the specifics in
- Grade and subject. Advice for Grade 2 mathematics and Grade 10 mathematics have nothing in common.
- What you already tried. It saves everyone suggesting it again.
- What you need. A workaround today, or a long-term fix? They are different answers.
Write a title that describes the problem
“Help please” tells nobody anything. “Grade 8 natural sciences — she understands the work but freezes in tests” tells a reader in one line whether they can help, and it is what a future parent with the same problem will search for.
Post it in the right place
Each forum has a description saying what belongs in it. A question in the right forum reaches the people who know that subject; a question in the wrong one waits.
Come back and say what worked
This is the part most people skip, and it is the most valuable. When something works, post it. The next family reads your thread instead of starting a new one — and a thread that ends with a real answer is exactly what gets turned into a Knowledge Base article.