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Filter any combination
Facts are tagged by cycle, domain, and difficulty — filter down to exactly Year 2 astronomy at medium difficulty, or leave it wide open.
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Built for classical homeschool families
Science Sprint opens immediately - First Quest stays free before full-plan choices
Play Science Sprint300+ science facts across human body, earth science, biology, ecology, astronomy, physics, chemistry, and anatomy/scientific method — organized by classical-cycle sequence and drilled with spaced repetition until they stick.
What's actually taught
The real inventory behind the Observatory — every domain below links straight into practice for exactly that content.
Find your stage
Classical science grows with your student — from wonder and story in the early years to mechanism, debate, and worldview analysis later. Pick the stage that fits and start on the right science resource today.
Already practicing? Change the level if this looks too easy or too hard.
Change my levelSpark wonder with discovery stories — the people and moments behind the science, no reading load required.
Hear the storiesLock in cycle-aligned memory work — multiple-choice, current-cycle facts, spaced repetition that sticks.
Open Science PracticeTurn recognition into automatic recall under a 60-second clock — great for review days and sibling competition.
Play Science SprintGo deeper on upper science — periodic table, anatomy, and taxonomy charts for self-directed study and lookup.
Browse Science ReferenceClassical Quest science practice aligns with the major classical science sequences — human body, earth science, biology, ecology, astronomy, physics, chemistry, and anatomy/scientific method — including the three-year Grammar Stage rotation many classical programs follow. We do not replace your curriculum; we provide spaced-repetition practice for the facts you are already teaching.
Grammar Stage students (K–6th) use the three-year memory-work rotation. Logic Stage students get upper science topics such as atoms, cells, genetics, plate tectonics, and observational astronomy. Rhetoric Stage students get high-school physics, chemistry, biology mechanisms, worldview-analysis topics, cosmology comparisons, and climate-system mechanics.
Facts are tagged by classical cycle (1, 2, or 3), by scientific domain (human body, earth science, biology, ecology, astronomy, physics, chemistry, anatomy/scientific method), and by difficulty (easy, medium, hard). You can filter on any combination — for example, Year 2 astronomy at medium difficulty.
Yes. Science is written for broad classical-Christian families. Mechanism and observation items teach the science directly; origins, evolution, and design items describe the major positions without adjudicating them; cosmology presents mainstream Big Bang and young-earth views side by side; climate items stay with system mechanics rather than attribution or policy.
How classical families approach science memory work, cycle-aligned fact study, and the spaced-repetition methods that make it stick.
A side-by-side look at five classical science curricula — Apologia, Berean Builders, Sabbath Mood, Memoria Press, Mr. Q's — with honest trade-offs for each.
ScienceCompare classical homeschool science options: full curriculum, living books, online classes, co-op labs, parent-built plans, and review tools.
ScienceA step-by-step approach to science with Grammar Stage students — nature journals, fact rotation, hands-on demonstrations, and how to layer them weekly.
ScienceHow classical homeschool families teach science by stage — observation-first in Grammar, logic and laws in Logic, defense and discourse in Rhetoric.
ScienceA parent's guide to Cycle 1 science — all 24 weeks of topics from human anatomy to ecosystems, with hands-on practice tips, experiment ideas, and tools to help your student retain it all.
ScienceA practical classical homeschool guide to combining science notebooking, observation, narration, diagrams, and memory work without turning science into worksheets.
ScienceA practical classical homeschool science scope and sequence: what to emphasize in Grammar, Logic, and Rhetoric stages, how to choose curriculum, and how to keep review steady.
ScienceA repeatable classical homeschool science practice schedule with reading, observation, notebooking, lab habits, memory review, and stage-specific weekly rhythms.
ScienceA practical guide to science apps and tools for classical homeschool families: simulations, NASA resources, video support, maps, notebooks, and review.
All eight classical subjects, in one app
470+ Henle words, grammar drills, NLE prep
Open Latin →
Times tables, fractions, geometry, Dr. Kat lessons
Open Math →
160 events from the Pyramids to the Apollo program
Open Timeline & History →
Every country, every capital, every continent
Open Geography →
Parts of speech, irregular verbs, sentence patterns
Open English Grammar →
Great artists, composers, drawing, music theory
Open Fine Arts →
Memory verses + Grammar Stage NT and OT passages
Open Bible →
Start with a 60-second science round, then use Science practice for cumulative review across the full fact library.
Play Science SprintUpper science path