I think perhaps its not HE itself that tends to make HEing parents so zealot about it, and more the fact that for many it is a positive solution to difficult issues, so you feel like finally the roadblocks to your child's education are removed. Certainly that's the way it was for us.
Its not an easy option, and personally I would caution anyone considering it to tread very carefully, but it can be a great option.
French2019 how do we measure progress? With great difficulty. There isn't really anyway to say this without sounding like i'm not so stealth boasting, but I'm not.
We HE DS because he's very gifted academically. We're not in the UK, and here the LEA couldn't educate him - their choice after trying to. DS tried school for a few months, and we tried a different, non English language school at the LEA's suggestion to try to challenge him more - he did speak the language I should add! He became more and more unhappy as he was bored. The child psychologist said he was becoming depressed, our lovely sunny, happy go lucky, eternally cheerful little boy was retreating into himself. At that point the LEA said they couldn't educate him
, and so began our HE.
He has come on in leaps and bounds, and his progress seems to snowball. We have criteria we measure his progress by but its specific to him, as it needs to be. DS is once again cheerful and happy, he loves HE as he says he doesn't get bored and he feels there are no limits to the pace at which he can learn.