Host family in countryside village near London

We are a family of four (2 kids both age 4) with a four bedroomed house in a countryside village Essex, UK, 30 mins by train from London. We are currently seriously considering home/world schooling and would like to host world schooling families so that we can learn more about world schooling. We enjoy hosting in general and have hosted travellers through couch surfing and HelpX for around nine years (and have all excellent reviews from our guests on those sites). We are hoping to do some travelling ourselves soon and will be offering our home for home exchange when we get some dates organised. I (Kerri) am a qualified primary and TEFL teacher and currently work as a supply (substitute) teacher, Andrew works in London full time.