what are some of the sage's accomplishment and current activities?

He achieved a lot on the aspect of education. Much of his approach to education was avante garde as he promoted the ideas "to educate all despite their social status" and "to teach according to the students' characteristics". He also proposed a complete set of principles concerning study.
Besides, in political aspect, he propose that the government should be a benevolent government and be kind to the common people.
For the current activities, there is a sacrificial ceremony on Sep. 28 which is the birthday of the sage.