Number and letter reversals are perfectly normal, and most children along the way make them. The vast majority of children will grow out of reversals, usually by second or third grade. For some children it is frustrating in first grade not to be able to make the letters/numbers correctly. We consistently practice correct letter and number formation in class. I will often have students correct their reversals to encourage proper formation, but at times you may see papers come home with reversals still present.