October 28, 2026
See how a Caesar cipher turns letter shifts into arithmetic modulo 26, then try decoding a short message yourself. A worked example shows why shifting past Z wraps back to A—and why this classic cipher is easy to break.
October 12, 2026
Mayan scribes used dots, bars, and a shell-shaped zero to write numbers in a positional system, usually based on 20. Try decoding a two-level numeral and see how place value changes its meaning.
September 24, 2026
A focused collection of explainers and foundational pieces that build number sense and practical numeracy skills. From arithmetic fluency to patterns and introductory code literacy, each article targets learners ready for concrete, real-number applications.