Doesn't matter which high school you go to, if YOU want to do well, then there IS going to be alot of work. There are two ways to go about high school, there's the people who slack off, don't care about their grades and cruise through no problems at all. Then there are those who are desperate to get good grades, work their backsides off and put every bit of effort into getting the best possible mark on every piece of work handed in for marking.
I worked my backside off and did alright. Originally I was aiming to get into vet science, however after going to a lecture about the course, I was put off. You have to be in it 100% for the love of it, the money is pretty average, you are studying 6 years full time with a huge emphasis on physics and chemistry. Then at the end of it, there's not that many job offers.
I decided to change my preference to animal science, which is similar to vet but it's more of a research bases subject, and after the first year you can try to jump across to vet science anyway if you feel so inclined. The TER for animal science is only 80 in universities here, not sure what it in interstate though, but I think your best bet if you REALLY want to be a vet, is to aim for vet science marks through school (vet sci. TER when I went through year 12 was from memory about 96. So that is almost perfect scores in every subject and you MUST have physics, chemistry, english studies and high level maths) and put animal science down as your second preference, then plain bachelor of science in case you don't get into either ;)
I had a GAP year (which I HIGHLY recomenend!! If you are someone that has strong goals, it is a great idea, you build up some funds, get life experience and get a cruddy supermarket job or similar to make you realise how important going back to study is! I had two receptionist jobs and one checkout job all at once, and I can't wait to get to Uni!) and decided to change my course again. Animal science doesnt offer a hell of a lot of jobs, and so I changed to agricutural science, but had second thoughts and swapped again, to environmental management. Best decision I could have made, 95% of graduates get a job before the end of their 3rd year and the average pay for a first year is VERY nice :P
Sorry for the uni talk haha! I had a 3 year old off the track tb mare when I was doing year 12, as well as working another tb for a lady and competing him. The first half of the year wasn't too bad, but the heat picked up towards the middle of term 3 and I decided to rest my mare out in the paddock until I finished exams. I didn't think I'd be able to cope without riding for a few months, but hounestly, it was the best decision I could have made. I was so much more focussed on my school work and knew that I had a horse sitting there waiting for me at the end of it. And no, she didn't forget everything that she'd been taught. You just need to jog their memory a little.
Unless your horse is a top competition horse and you're an elite rider, putting him out into the paddock for a couple of months isn't going to hurt either of you.
I've now gone 9 months without riding and am absolutely hating it, just cannot find the right horse for me, so really, 3 or 4 months is nothing ;)