One thing I remember from home ec at school was pattern drafting. I don't remember much of the detail just the wonder of it. Making 2d pieces of paper to cut fabric shapes that would fit the body's topology when sewn together was sort of magical. Even without the pattern drafting, dressmaking using ready made patterns really helped me develop spatial and shape awareness.
I started sewing about 10 or 11 I think on my Nan's hand cranked Singer then moved to Mum's treadle Singer which was much faster.