Public schools don't ALL suck in Florida, but it varies A LOT from county to county as well as within counties. There is a ton of parental involvement in my area--to the point that there are sometimes lotteries to determine which parents get to chaperone a field trip or help supervise class parties. And the PTA has such high membership rates and involvement with fundraisers that we're able to pay for extra staff and provide other "extras" that really shouldn't be "extras" but should be funded by the district. But to be zoned for these schools generally means buying a home in a pricey neighborhood. The wealthier parents are lucky enough to have the time and resources to devote to the schools. Also, middle schools do not fare as well and high schools are even worse because those resources get spread a lot thinner as the schools get larger with a lot more students from less privileged households being bussed in. The feeling of the "neighborhood school" diminishes in middle school and is gone by high school. A lot of parents move their kids to private school for high school. There are also some very good magnet and charter options (but there are even more truly horrendous ones so you have to be very careful) for middle and high.
That said, I don't know anything about the schools in Orlando so I'm no help at all, lol. I just needed to stand up for Florida schools a little, because not all of them deserve the bad reputation. And since your kids are high-school age, there's probably a near-zero chance that you're going to find them a "good" public school in Orlando. Even the worst of them seem to be fine for motivated students, though, I've noticed. Many of my neighbors sent their kids to our poorly rated public high school and they kept strictly to the honors and AP classes and did well, and went on to good colleges. These kids were self-starters with very good self-discipline and work ethics, though. The good thing about private schools is that they tend to require more of even the less motivated students; no one is allowed to go under the radar and just drift through school without doing much. But I think that kids who really want to be successful can do so even in some of the "worst" schools.