An open record

Content updates

What changed, where it changed, and why.

This record begins with the study release. Change dates are separate from the Sources checked dates on lessons. See how source review is described.

· addition

A study space connected to the Library

Added recall flashcards, repeatable lesson self-checks, saved lessons, and an automatic study record in the current browser. Supporting lesson links let readers return to the explanation behind an answer. This addition does not renew the scientific source-check dates of the supporting lessons.

· addition

More ways to move between reading and practice

Added related practice links and companion lessons for quick reference guides. Screen guide text is larger, and overflowing tables show a sideways-scrolling cue. Existing print layouts remain separate from screen styling.

· correction

Clarified how chemistry explanations are shared

The chemistry simulator previously implied that written explanations were sent to an instructor. They appear in the printable practice record. Learners can share that record through their instructor’s usual process; there is no automatic delivery.