Well, blame Department of Education, and lace of training of all teachers that's why. also the older generation need to explain it to the younger that this is how it done or read from this year to that year...
I don't know why not lao govt. won't consider Lao nai and Lao nork who got expertis in Lao language bring them together to fix system for better for next generation to come. This is very big problem that we have country, but our language is joke because the department of education system is ignoranced to solve these issues.