Thinking about it, Neither my mum or dad encouraged me with school work, Same as you OP, Parents never asked if I had any homework or if I had completed it. They were keen for me and my siblings to work ASAP so I ended up in a dead end job from the day I left school, This was so we could pay them board.
My parents weren't mean, abusive or addicts, They just weren't very "maternal" (or the dad equivalent), Don't get me wrong, we had good dinners,Clean/New clothes, went on holiday every year, happy Christmases etc, They just lacked in the physical/emotional support, They never asked where I was going when I went out after school, or who with, just to be back by a certain time. I think money was always an issue, even though they both worked full time, with board paid weekly by myself and my siblings, I know me and my sister used to pay £30 a week, and that's 25 years ago, I've took a loan out for them in the past, (when i still lived at home) they made the first couple of monthly payments, but then stopped because they couldn't afford it so it was left to me to pay them. They are divorced now, and both are in a better financial position for whatever reason, they don't support me financially, not that I would expect them to, they do lend me money if i need something I cant afford right away, like a washing machine, or something for my car, They are the last people I ask though, as they both lecture me and give me 20 questions as to where "all my money goes" ( I am a single parent earning a very modest wage),I should manage my money better and to make sure I pay it back. Things have got better over the years with emotional support though, They will listen to my woes (usually work related) and give advise. They have never said they love me, although I know they do. It has made me they way I am though, I always tell my kids I love them, and I am always asking where they are and who they are with, I am very strict with homework - Maybe a bit too strict. I think i probably do their head in lol.