Minnesota's Northfield Public Schools has a school-based, school-led mentoring program for grades 1-12.
Note that it receives the quality label of "100% Best Practices" from the Mentoring Partnership of Minnesota's quality standards assessment.
From the webpage -
Connected Kids Mentoring
Connected Kids is a grant-funded initiative of Northfield Public Schools in partnership with the Northfield Mentoring Coalition. The school-based mentoring initiative pairs adult volunteers one-on-one with students. Mentoring helps youth to develop strengths and talents by supporting the efforts of other significant adults such as parents and teachers. Research has shown that the more caring adults a child has in his or her life, the less likely it is that the child will engage in risky behaviors.
Connected Kids basics …
Who: Youth in grades 1-12 and adults who care about young people What: A one-on-one mentoring relationship, providing friendship, encouragement and academic support. When: Year round, during or after school, for 1 to 2 hours per week plus e-mentoring Where: At our elementary schools, St. Dominic or Northfield Middle School Why: Mentoring is one of the most effective ways to help young people achieve their potential and discover their strengths.
Connected Kids has earned the designation of “Expert Partner” by the Mentoring Partnership of Minnesota for meeting the highest standards for a quality mentoring program.
Connected Kids benefits …
Time with a caring adult
Better academic performance and test scores
Stronger attachment to school
Better self esteem and interpersonal relations
Extra support for children
Safe environment for children
Improved relationship with school staff
Learn from mentees
Reap rewards through helping a young person succeed