Khan Lab School (KLS) implements a unique mixed-age model that groups students based on independence levels and developmental stages rather than traditional grade levels12. This approach allows for peer-to-peer learning and collaboration across different age groups, fostering a dynamic learning environment2. Key aspects of KLS's mixed-age model include:

• Students are grouped into "age bands" based on developmental stages, allowing for more nuanced educational approaches34

• The model encourages younger students to learn from and be mentored by older peers, promoting maturity and responsibility34

• Mixed-age groupings create a consistent culture across the school, with shared expectations for all students5

• Teachers adapt their teaching methods to accommodate varying developmental stages within a single classroom4

• The flexible structure allows students to move between groups based on their mastery of skills and independence levels12

This innovative approach aligns with KLS's broader philosophy of personalized, mastery-based learning, empowering students to progress at their own pace while benefiting from diverse peer interactions62.

Several high schools across the United States have implemented mastery-based progression models to enhance student learning and achievement. Some notable examples include:

• Purdue Polytechnic High School in Indianapolis, which uses a competency-based approach where students progress through projects and earn credits based on demonstrated mastery1.

• Lindsay Unified School District in California, which has transformed its entire K-12 system to a performance-based model, allowing students to advance upon mastering specific skills and content2.

• Westminster Public Schools in Colorado, where students progress through "performance levels" rather than traditional grade levels, focusing on individualized learning paths3.

• Building 21 in Philadelphia, which utilizes a competency-based framework allowing students to earn credits through various learning experiences, including internships and community projects4.

These schools prioritize personalized learning experiences, flexible pacing, and clear learning objectives to ensure students develop essential skills and knowledge before advancing to more complex concepts.

Laurel Springs School offers a flexible, self-paced curriculum that allows students to progress through coursework at their own speed while ensuring mastery of concepts1. Key features of their approach include:

• Asynchronous learning model accessible 24/7 from anywhere2

• Mastery-based progression requiring at least 70% proficiency before advancing3

• Personalized support from qualified teachers and counselors4

• Over 200 courses available, including AP and honors options2

• Opportunity for students to revisit lessons and receive additional help when needed1

This self-paced model enables students to balance academic pursuits with other commitments, such as athletics or performing arts, while still receiving a rigorous education tailored to their individual needs and learning styles45.

The Grauer School in Encinitas, California, employs a distinctive Socratic approach to education, emphasizing great questioning and active listening to foster student growth and self-knowledge1. This method is integrated into their small class sizes, typically averaging 8-10 students per teacher, creating an environment conducive to meaningful dialogue and personalized learning2.

Key aspects of The Grauer School's Socratic approach include:

• Probing for clarity rather than "right" answers, encouraging students to refine their thoughts and challenge assumptions1

• Applying Socratic questioning across various subjects, including math problem-solving and test preparation3

• Combining Socratic dialogue with other educational philosophies like Waldorf, Montessori, and Mastery Learning to create a comprehensive learning experience4

• Utilizing the method to develop critical thinking skills, self-motivation, and engagement in students5

• Encouraging students to set their own aspirations and take responsibility for their progress, fostering intrinsic motivation2

This Socratic approach aligns with The Grauer School's commitment to nurturing intellectual curiosity, perseverance, and compassion in their students, preparing them for lifelong learning and personal growth2.