I work with Head Start in the US. We also use the same materials and they really are great. The issue I am running into is how to be cutting edge with STEM and be developmentally appropriate with activities. The vast majority of apps are just glorified worksheets and worksheets don't work. When you do a 1 for 1 real-life to digital-life examples the real-life works better 100%. If I want to show cause and effect nothing works better than dominions.