1) Encourage children to play maths puzzles and games at home. Anything with a dice will help them enjoy maths and develop numeracy and logic skills.
2) Never tell children they are wrong when they are working on maths problems. There is always some logic to what they are doing. So if your child multiples three by four and gets seven, try: “Oh I see what you are thinking, you are using what you know about addition to add three and four. When we multiply we have four groups of three…”
3) Maths is not all about speed. In younger years, forcing children to work fast on maths can actually be the best way to start maths anxiety, especially among girls.
4) Don’t tell your children you were bad at maths at school. Or that you disliked it. This is especially important if you are a mother.
5) Encourage number sense. What separates high and low achievers in primary school is number sense.
6) Encourage a “growth mind-set” – the idea that ability changes as you work more and learn more.
SOURCE: http://www.brainbox.co/archives/3012