i am doing gcse music currently. i play cello at grade 5 level,and took up piano because of its general usefulness. i am doing grade 1 in june, but i only have a (shitty, 15 year old, 4 octave, non-weighted keys, dynamicless, pedalless, on loan from a friend) keyboard to practise on.
i want to buy a real piano, i have more than enough saved, but my mum won't let me because she doesn't want the noise.
my piano teacher doesn't know of this.i think this is really so unfair, don't you?

I don't think it is fair or not fair. She obviously is not a musician so thinks your electronic keyboard is satisfactory. And considering the number of music groups today that don't use real keyboards she doesn't have a clue why you would need a real piano.

Here is another possible reason - - when you, should you go off to school, to work, or just out on your own there is a large, very large chance you will not take your piano with you and it will just sit there in her house/apartment/condo. She will be stuck with it.

My advice is don't think about the 'fairness' or 'unfairness' of the situation. Think about that she doesn't want the piano in the house because of the noise she will hear. That said, look into the modern electronic pianos that do have simulated touch, etc. The Yamaha Clavichord and others are pretty nice, have headphones, and can be moved easily into your dormitory room or apartment at a later date.

What about a good digital piano? Besides the volume knob on my Yamaha, it has a headphones jack. Plus it's pretty easy to transport...

Well....if she's upset about the sound (I won't call it noise), there are some good digital ones with weighted keys about....I got mine second hand off ebay and it's perfect. But hey, forget about whether it's unfair or otherwise, the bottom line is if you want it enough you'll find a way, even if that means bugging someone enough to let you practise on theirs, or finding one in a cafe or a church or someone's garage.

Good luck

You may not give enough credits in your mother. She may think that you practice Cello for few years, Piano for few years, then Violin, Flute, etc. That is a waste of money to buy all expensive instruments.
I suggest you buy a digital piano with weighted at a thousand dollars, and show your mother how serious you are in musics. If you are a good student at 7 grade, I believe that you mother will buy you a piano at 200 thousand dollars.

no I Don't think this is unfair. You are very privileged to be able to play one instrument let alone two. When I was learning to play piano I had to practice on my grandmothers organ which was powered by pedal powerered bellows. Practice on your loaned instrument and prove to your mother you are serious then ask her again.