Russell Siima, who started his first year of kindergarten at a public school in Montgomery County, Md., this week, waves goodbye to his parents. (Ben de la Cruz/NPR)Millions of children across the United States are stepping into kindergarten for the first time. My son, Russell Siima, started the first year of his primary education in a public school in Montgomery County, Md. Russell shows off a placard commemorating his first day of kindergarten earlier this week. On my son’s first day in kindergarten, I got to be there.