What these references mean
Lessons reference Common Core, NGSS, preschool developmental goals and selected exam or subject frameworks. A related standard identifies a connection to a skill; it does not establish complete instruction, assessment coverage or approval by a state or school district.
The catalog does not constitute a complete Pre-K–12 curriculum. Complete social studies, arts, physical education and world-language sequences are not provided, and a crosswalk for every state has not been established. Science performance expectations can require investigations, models, data analysis and engineering work beyond a short lesson or quiz.
The NGSS registry below contains 208 performance expectations; 64 had no mapped topic reference in the earlier audit. The science project library now provides 64 teacher-led extensions for these references, with tasks, evidence or model inputs and teacher rubrics. These additions do not establish complete instruction or assessment coverage for all expectations.
Practice tests, books and generated help
SAT practice uses recurring original templates with varied numbers and contexts. Timed forms offer easier and harder second modules, but routing and score estimates are not officially calibrated. ACT practice uses enhanced section timing and four choices; a full practice bundle includes science, while its composite uses English, math and reading. Check official exam requirements for your administration.
Book listings link to external publications. Their complete interiors were not available for the site content review. Inspect sample pages, edition details and coverage before selecting a book.
Lesson text and assessment banks received automated checks and targeted content corrections. Only selected media received full review. AI tutor responses and game outcomes vary and have not been exhaustively reviewed. Use them as study support and check uncertain answers against lesson sources or with a teacher.
Official SAT structure · Official ACT information · NGSS · Common Core
Explore standard references and gaps
“No topic or project” means neither a topic reference nor a project extension is listed. A topic or project reference shows a connection; complete instruction, assessment coverage and state alignment remain unverified.
Download the coverage register