Question about CV

[NoSkillz514]

For a bit of context, I had taken the majority of my classes in 11th and 12th grade at my local uni and decided to continue my education there. I'm technically on my "first" year here, but I will also be finishing up this year as well and I'm currently working on math grad apps. To be quite honest, I don't have too much undergraduate awards/experiences beyond research w professors at the university, and I'm considering including some high school experiences on my resume. As long as its somewhat substantial and happened in the past 1.5 years, should I include it on my application for graduate school? Thanks in advance.