The Triangle of Arithmetic – California State Series, Grade 3

This vintage Grade 3 math book from the California State Series, The Triangle of Arithmetic, features fantastic 1950s-style graphics and clear, structured lessons. A wonderful example of mid-century educational design—great for both collectors and creatives.

Title: The Triangle of Arithmetic
Grade Level: 3
Series: California State Series
Condition: Vintage; may show school use, writing, or wear (see photos)

📚 Packed with great graphics—perfect for junk journaling, altered books, vintage decor, or math-themed creative reuse!