RS4K Book 3 — Biology (Ch 6-9): Grade 3 atoms-first chapters. Foundation 100%, Gap 0.0%, Map Error 0.0%, Practices 85.7%, no FSEs. Photosynthesis and respiration framed at atom-rearrangement level. Carbon cycle as atoms used over and over. Recommended Deep.
| Program | RS4K - Science Book 3 — Biology |
| Publisher | Gravitas Publications Inc. |
| Author | Rebecca Woodbury, Ph.D., M.Ed. |
| Grade Band | Grades 3-5 |
Verdict: ✓ Recommended — Deep. Foundation_calc 100.0%, deep tier. Practices 85.7% green (book-wide score). Zero map errors. Zero confirmed FSEs.
Strict atomic-foundation scoring. The Biology quarter of Book 3 (Chapters 6-9) uses the universal atomic claims established in Ch 3 and Ch 10 as the explanatory anchor. Adjusted Gap 0.0%, Map Error 0.0%.
Chapters 6-9 cover plant biology and the carbon/oxygen cycle at the atomic level. Plants are framed as making their own food from atoms (carbon dioxide and water rearranged into glucose via photosynthesis). The carbon/oxygen cycle is taught as atoms being used over and over — carbon atoms moving between CO2 in air, glucose in plants, and CO2 from animal respiration. Plant growth experiment in Ch 9.
"Plants make their own food by rearranging atoms — carbon dioxide and water become glucose." (Ch 7 photosynthesis)
"Carbon atoms cycle through the air, plants, and animals — the same atoms are used over and over." (Ch 8 carbon cycle)
"Carbohydrates fuel us through atom rearrangement during cellular respiration." (Ch 8 metabolism)
FSE_CONFIRMED: 0. No factual science errors found in this quarter.
Map errors: 0. No OAO error (REI-substance, REI-agent, LAE, AEC all zero).
Practices: 85.7% green. Five of seven NGSS scientific practices PRESENT; mathematics and argument-from-evidence are PARTIAL. Every chapter operationalizes the question-hypothesis-experiment-data-conclusion arc through the RATATAZ Experiment series. The practices score is computed book-wide and applies identically to all five subject entries.
Nothing structural. The Biology chapters score clean on every WWG metric.
The five RS4K Book 3 subject entries (Chemistry, Biology, Physics, Geology, Astronomy) all share Foundation 100%, Adjusted Gap 0.0%, Map Error 0.0%, Practices 85.7% — the curriculum’s architecture is uniform because Chemistry establishes the universal atomic claim in Ch 3 and Physics extends it to subatomic particles in Ch 10.
| Total Passages Scored | 10 |
| Raw Gap Error | 71.4% (5 of 7 mechanism passages do not name atoms in the passage itself but are SCAFFOLDED by Ch 3/Ch 10 atomic framings) FALSE = atoms/molecules not present before students are asked to explain. The student is navigating without a starting point. |
| Adjusted Gap Error | 0.0% (0 UNSCAFFOLDED — atomic foundation established in Ch 3 and Ch 10, used throughout) UNSCAFFOLDED = no atomic grounding at all. LESSON_ATOMS = atoms mentioned elsewhere in lesson but not connected to this concept. |
| Substance-Model Errors (REI) | 0 Curriculum treats a process or outcome as a substance - "heat flows," "energy is stored," "electricity flows like water." Student builds a substance ontology. |
| Label-as-Explanation (LAE) | 0 Curriculum provides a name and treats it as an explanation - "this happens because of gravity." Student believes knowing the name IS understanding the concept. |
| Vague-Entity Errors (AEC) | 0 Curriculum uses vague entities ("tiny particles," "building blocks") without specifying atoms or molecules. Student invents their own model with macroscopic properties. |
| Factual Science Errors (FSE) | 0 Statements that are scientifically incorrect - not imprecise framing, but wrong. Any confirmed FSE = Not Recommended. |
| Practices | 85.7% - Deep Seven practices scored PRESENT, PARTIAL, or ABSENT and averaged: asking questions, developing and using models, planning and carrying out investigations, analyzing and interpreting data, using mathematics, constructing explanations and designing solutions, and argument from evidence. Higher is better, the opposite direction from gap and map errors. Reported but not part of the Foundation Score or the verdict. |
Photosynthesis and respiration framed at atom-rearrangement level. Carbon and oxygen cycles taught as atoms used over and over.
Atomic foundation established in Chemistry (Ch 3) and extended to subatomic particles in Physics (Ch 10), then used throughout the Biology quarter. Photosynthesis and respiration framed at atom-rearrangement level. Carbon and oxygen cycles taught as atoms used over and over. Practices 85.7% green (book-wide).
Recommended (Deep) — Deep by design -
Evidence for every entry is published at three levels. Each level states what it contains and what it leaves out.
Scores, verdict, and the full pattern count for this unit are above: adjusted gap, REI / LAE / AEC counts, FSE status, and the seven-practice score. Passage-level detail for this unit is carried in the downloadable evidence file.
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