Charliegal - I think the thingthat made it easy for my brother and me to go through school etc was the fact that mum and her partner were always very open and honest, no nonsense about them being 'friends' or whatever, they were very open about the fact they were girlfriend and girlfriend, and if they were allowed they would be married etc.
To be honest, I got slightly more hassle at school that my brother (he is 8 years younger) because by the time my brother was at school it was all old news anyway. Some teachers (old school types) were a bit cats bum face about it, I could tell as a child that they disapproved, but they never actually said anything. Not til I was older did mum tell me that some teachers were awful to her, said she was scarring me for life, she was disgusting and and as a church going christian how could my mum do such things. Like I said, mum was very brave coming out in 80's Devon!
Some friends at school were very much 'why don't you have a daddy, why do you have two mummies' etc, just innocent questions looking back. I just answered them honestly and without shame (well, I wasn't ashamed, it was all well and normal for me!!), some kids just took it at face value, some kids responded 'well my mummy think it's wrong'' etc. Which was hurtful, to be honest, butno more so than so-and-so saying that she didn't want to be friends with me anymore because I liked My Little Pony (cried for ages about that one lol!). But I told my mum and we all talked about it. It must have all been so much more hurtful for my mum and her partner than it was for me, really.
At teenage years there was a lot of 'oi, you mum's a LESBIAN' hurled across the playground. To which I responded 'yeah well your a mum's an ugly cow' - not the most mature behaviour from either of us. Used to get a lot of stupid questions like 'which one is the man' and 'does your mum use a strap one'. Usual response to those was f** off, frankly!
The one thing that caused ructions was that not all my mum's family were supportive of her being gay (mum's girlfriend's whole huge family were fine about it). My mum's mum was very against it all and tried very hard to convince me that mum was bad. Which was a conflict because I spent an awful lot of time with my gran (childcare mostly) and I was very close to her. It caused a lot of resentment between my mum and gran and they didn't speak for over 20 years (although I was still in contact with my gran) and wasn't resolved by my gran's death.
Charliegal - you have a little boy - I can honestly say that it has never ever been an issue with my brother having been raised by 2 gay women. He loves them both (calles them both mum), knows how he was concieved and is very, very proud of it (he also knows and is in contact with his father, although he has had no dealings with his upbringing). My brother absolutely has no issues with the way he was raised, and had little or no hassle at school about it - my mum was very worried about this as she thought the whole gay mum issue would be more problematic with a son. Not so. We have had our ups and downs (haven't we all!)) but we have a very happy family. I hope you and your partner have an equally lovely family