The curriculum in the United States continues to focus on basic skills, well past the fourth grade. In my opinion, that is not good.
In classrooms in Japan, European countries, and other countries emphasize more advanced concepts--including algebra, geometry, and probability.
So, the United States needs to start with similar curriculum as rest of the world and not to waste that much time on basics. They need to encourage teaching of experimental probability concepts beginning in the elementary grades. In addition, the study of probability allows learners to make sense of experiences involving chance.
The development of students' mathematical reasoning through the study of probability is essential in daily life. Probability represents real-life mathematics.