How to practice: Children will not learn to subitize, or recognize dot patterns over night. It takes a lot of practice. But the good news is that the best way to learn is to simply play games with dice! Start with a nice BIG pair of dice, if you can get them. These are easily found online. Let children count the dots as much as they need, and then after a while, they will probably begin to simply recognize how many dots there are based on the dot pattern alone.