Where our information comes from
Every word list on this site is checked word by word against at least two independent published sources, such as a state education department, a school district, a university literacy center or Reading Rockets, and the counts are enforced when the site is built: a Dolch level with the wrong number of words stops the build. The words marked as in the app come straight from the app's own data file. The review ledger lives in the repository as WORD-LISTS-REVIEW.md.
How we use AI
AI may help draft the explanations around each list. The lists themselves are never generated: they are transcribed from sources and verified before a page becomes indexable.
What this site and the app are
A practice tool and a reference, written for parents and teachers. Neither assesses a child's reading, diagnoses a difficulty, or replaces a teacher, and nothing here promises an outcome. Schools choose their own word lists, so your child's teacher is the right source for what they are expected to know.
Corrections
We want to get this right. If you spot an error, tell us and we'll review it against the sources and update the guide.