The students building and teaching COSMO.

Four co-founders. Four lead instructors.

Curriculum decisions, live facilitation, and revisions stay connected to the people doing the teaching.

Named ownership, shared teaching work.

Logan Woo

COSMO leadership team
  • Co-founder
  • Lead instructor

Siddhant Rana

COSMO leadership team
  • Co-founder
  • Lead instructor

Anikait Rana

COSMO leadership team
  • Co-founder
  • Lead instructor

Joshua Tsimberg

COSMO leadership team
  • Co-founder
  • Lead instructor

Build. Teach. Revise.

COSMO's lead instructors turn a problem into a session arc, teach from it, and revise the packet so another student leader can run the same room. The public lesson library records that work with release and revision dates.

  1. 01
    Build the entry point

    Start with a problem students can attempt before the formal vocabulary arrives.

  2. 02
    Teach the discussion

    Compare strategies, surface mistakes, and ask students to defend each step.

  3. 03
    Revise the packet

    Clarify diagrams, timing notes, worked examples, and facilitator moves for the next instructor.

Hebron High School

See the teaching materials and public resources supporting COSMO's Hebron High School chapter.

The school name identifies the chapter location and does not imply institutional endorsement.
Inspect the lesson archive Browse published resources