THE RESOURCE LIBRARY

ACT Math: Knowledge Library & Illustrated Guides

Illustrated teaching guides, official reference links, and a transparent source record.

$Original diagram: Read the data before choosing the summary.$ VIDEO → ARTICLE

The Organic Chemistry Tutor · 9 min read

Read the data before choosing the summary.

Frequency, center, spread and the effect of an unusual observation.

Read the illustrated guide

$Original diagram: Find the feature. Then choose the algebra.$ VIDEO → ARTICLE

The Organic Chemistry Tutor · 9 min read

Find the feature. Then choose the algebra.

Roots, restrictions and vertex meaning without unnecessary calculation.

Read the illustrated guide

$Original diagram: Give every matrix entry an address.$ VIDEO → ARTICLE

The Organic Chemistry Tutor · 10 min read

Give every matrix entry an address.

From indexed inventory to meaningful matrix operations.

Read the illustrated guide

$Original diagram: Read the direction of a model’s miss.$ VIDEO → ARTICLE

Khan Academy · 10 min read

Read the direction of a model’s miss.

Predictions, residuals and fair comparisons between candidate models.

Read the illustrated guide

These guides use actual video captions for a short source synopsis and timestamp map. Teaching text, worked examples, and diagrams are original companions. They do not reproduce full transcripts or downloaded video.