Teaching Curriculum
Ready-to-use lesson plans, student worksheets, and answer keys for teaching Euclid's Elements Book I. Designed for homeschool families and classroom teachers.
Free Sample
Free
Lesson plans, worksheets, and answer keys for Propositions 1–5.
- ✓5 lesson plans (Understanding by Design)
- ✓5 student worksheets with diagrams
- ✓5 answer keys with teacher notes
- ✓Covers basic constructions
Foundations
$9
Full curriculum for Propositions 1–26: constructions through triangle congruence.
- ✓26 complete lesson plans
- ✓26 student worksheets
- ✓26 answer keys
- ✓Triangle congruence & parallel lines
Advanced
$12
The second half, Propositions 27–48: parallels → angle sum → the Pythagorean theorem.
- ✓22 complete lesson plans
- ✓22 student worksheets
- ✓22 answer keys
- ✓Covers parallels through the Pythagorean theorem
Already have Foundations? This is the second half.
Buy $12Complete Collection
$19
All 48 propositions. Best value.
- ✓All 48 lesson plans
- ✓All 48 student worksheets
- ✓All 48 answer keys
- ✓Culminates in the Pythagorean theorem
Free Sample: Propositions 1–5
Every document from the first five propositions, free to download. These are the same materials the paid bundles contain.
- Proposition 1: Construct an equilateral triangleLesson PlanWorksheetAnswer Key
- Proposition 2: Copy a segment to a pointLesson PlanWorksheetAnswer Key
- Proposition 3: Cut a segment to match a shorter oneLesson PlanWorksheetAnswer Key
- Proposition 4: SAS congruenceLesson PlanWorksheetAnswer Key
- Proposition 5: Isosceles base anglesLesson PlanWorksheetAnswer Key
What's included?
Lesson Plans follow the Understanding by Design framework: warm-up, direct instruction, guided practice, independent work, and closure. Written in a warm, conversational tone.
Student Worksheets guide learners through each construction and proof with space for their own work.
Answer Keys include model answers and teacher notes so you can check understanding and address common mistakes.