To fill resume's education section, mention your top College projects, group works, or any other practice. If you graduated, give recruiter more information about your best scientific project - Bachelor's work. Fill education section with college achievements but don't overcrowd it – 2-3 bullet points are enough for the whole section.
College and High School are great places where you can gain professional skills and initial experience. Learn to target them to particular job industry and impress recruiters by results-driven sentences.