I’ll be honest, I don’t really know much about Habitat for Humanity. I’m mentioning them here because they posted a comment under one of the blog posts and I just went and took a quick look at their site.
They have quite a wealth of lessons (detailed plans, learning outcomes, materials etc), categorised by age ranges. The bad news is that these lesson plans are not aimed at foreign language learners. So the stuff in the 5-8 category might be a bit beyond the non-native speakers, though there are a couple of colouring tasks which might work?
I think adaptation is going to be the name of the game here. I think there’s quite a lot of stuff here that is likely to be of interest to learners and some things that might make some nice end of year/term projects. It should appeal to the cross-curricular / CLIL crowd….
Habitat for Humanity operates in a large number of countries around the world, so the chances are you’ll be able to find a local office, which might make things a bit more relevant to the learners?