Probably the best way for you is if your husband can qualify as a highly skilled worker (Tier 1 General) visa under the points based system. If he can score enough points from his qualifications, experience and salary levels etc, he may be eligible for this visa which allows him to come to UK to look for jobs and take up a suitable post. Other work visas require a job lined up in advance, with sponsorship from prospective employer, which as you can imagine is quite difficult in current job market.
UK Border Agency | Highly skilled workers
You qualify as a dependant family member, and you can work in UK without any further permission. To work on a permanent contract in a UK state school, you need to have teaching qualification called QTS - qualified teacher status. Sadly your state teaching certification/license won't be recognised as equivalent, and you will have to go on a course for an overseas trained teacher, requiring a portfolio of evidence and passing lesson observations before being granted QTS. You can work as unqualified teacher for 4 years before having to get QTS. There are no such restrictions for working in a private school, or a US curriculum international school.
For you to qualify as a main breadwinner (salary earner) as a teacher will be more difficult, as the UK government has recently tightened visa rules for overseas teachers. Basically only those teaching secondary (high School) shortage subjects such as Math and Science can get a work visa without the school having to prove shortage of suitable applicants from UK and EU - not likely in the current oversupply of teachers in most areas of UK. Being eligible to work as a teacher doesn't mean it will be easy to find a teaching job, in a shrinking labour market and tough competition for teaching posts. Lack of UK experience will be a further handicap. While a few years ago it was quite easy to pick up supply (substitute) teaching jobs in London for overseas teachers, the situation has changed dramatically as more people are entering or returning to teaching, having been made redundant or escaping from poor job prospect in industry and commerce.
There's never an optimal time to relocate to another country, and UK is still mired in recession with poor job prospect and uncertain future. So do weigh up your options very carefully before you make what may turn out to be an expensive mistake. And always have a plan B (as we say in UK) if things don't work out and you need to return home. Don't burn all your bridges.
Best of luck!