Biology: your test-prep path

Explore the units

Use your study plan above for your recommended next step, or choose a unit below.

1. Unit 1 · 2 targeted skills · Untimed

   Biomolecules, cells & viruses

   • Connect cell and biomolecule structures to functions
   • Explain transport using virtual membrane evidence
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   Unit details and family access

   Learn through a targeted diagnostic, explicit explanation, worked models, guided and independent practice, application, and a fresh reassessment. Full original unit resources are included.

   Focused self-paced EOC preparation with original questions and full retained course resources. Results describe this practice only, not STAAR readiness, course credit, or mastery of every listed standard.

   Open with a family learner account

   • Not an official TEA test or an exact simulation of every technology-enhanced item type.
   • A short objective check does not establish complete standards mastery; written application needs thoughtful self-review or educator feedback.
   • Virtual and supplied-data tasks support scientific reasoning; they do not establish physical laboratory proficiency.
   • B.5(C) membrane transport is preserved as foundational instruction, not claimed as an eligible expectation in the current Biology assessed-curriculum document.

2. Unit 2 · 2 targeted skills · Untimed

   Cell growth & differentiation

   • Trace the cell cycle and DNA replication
   • Explain differentiation and cell-cycle disruption
   Study this unitTry this unit
   Unit details and family access

   Learn through a targeted diagnostic, explicit explanation, worked models, guided and independent practice, application, and a fresh reassessment. Full original unit resources are included.

   Focused self-paced EOC preparation with original questions and full retained course resources. Results describe this practice only, not STAAR readiness, course credit, or mastery of every listed standard.

   Open with a family learner account

   • Not an official TEA test or an exact simulation of every technology-enhanced item type.
   • A short objective check does not establish complete standards mastery; written application needs thoughtful self-review or educator feedback.
   • Virtual and supplied-data tasks support scientific reasoning; they do not establish physical laboratory proficiency.
   • B.5(C) membrane transport is preserved as foundational instruction, not claimed as an eligible expectation in the current Biology assessed-curriculum document.

3. Unit 3 · 2 targeted skills · Untimed

   DNA, gene expression & inheritance

   • Use gene-expression models and evaluate mutations
   • Reason with meiosis and inheritance probabilities
   Study this unitTry this unit
   Unit details and family access

   Learn through a targeted diagnostic, explicit explanation, worked models, guided and independent practice, application, and a fresh reassessment. Full original unit resources are included.

   Focused self-paced EOC preparation with original questions and full retained course resources. Results describe this practice only, not STAAR readiness, course credit, or mastery of every listed standard.

   Open with a family learner account

   • Not an official TEA test or an exact simulation of every technology-enhanced item type.
   • A short objective check does not establish complete standards mastery; written application needs thoughtful self-review or educator feedback.
   • Virtual and supplied-data tasks support scientific reasoning; they do not establish physical laboratory proficiency.
   • B.5(C) membrane transport is preserved as foundational instruction, not claimed as an eligible expectation in the current Biology assessed-curriculum document.

4. Unit 4 · 2 targeted skills · Untimed

   Evolution & population change

   • Explain population change through natural selection
   • Distinguish ancestry evidence and evolutionary mechanisms
   Study this unitTry this unit
   Unit details and family access

   Learn through a targeted diagnostic, explicit explanation, worked models, guided and independent practice, application, and a fresh reassessment. Full original unit resources are included.

   Focused self-paced EOC preparation with original questions and full retained course resources. Results describe this practice only, not STAAR readiness, course credit, or mastery of every listed standard.

   Open with a family learner account

   • Not an official TEA test or an exact simulation of every technology-enhanced item type.
   • A short objective check does not establish complete standards mastery; written application needs thoughtful self-review or educator feedback.
   • Virtual and supplied-data tasks support scientific reasoning; they do not establish physical laboratory proficiency.
   • B.5(C) membrane transport is preserved as foundational instruction, not claimed as an eligible expectation in the current Biology assessed-curriculum document.

5. Unit 5 · 2 targeted skills · Untimed

   Energy & interacting systems

   • Use matter, energy, and enzyme models
   • Explain interacting plant and animal systems
   Study this unitTry this unit
   Unit details and family access

   Learn through a targeted diagnostic, explicit explanation, worked models, guided and independent practice, application, and a fresh reassessment. Full original unit resources are included.

   Focused self-paced EOC preparation with original questions and full retained course resources. Results describe this practice only, not STAAR readiness, course credit, or mastery of every listed standard.

   Open with a family learner account

   • Not an official TEA test or an exact simulation of every technology-enhanced item type.
   • A short objective check does not establish complete standards mastery; written application needs thoughtful self-review or educator feedback.
   • Virtual and supplied-data tasks support scientific reasoning; they do not establish physical laboratory proficiency.
   • B.5(C) membrane transport is preserved as foundational instruction, not claimed as an eligible expectation in the current Biology assessed-curriculum document.

6. Unit 6 · 2 targeted skills · Untimed

   Ecology & environmental change

   • Model ecological interactions and energy flow
   • Evaluate nutrient cycles and ecosystem change
   Study this unitTry this unit
   Unit details and family access

   Learn through a targeted diagnostic, explicit explanation, worked models, guided and independent practice, application, and a fresh reassessment. Full original unit resources are included.

   Focused self-paced EOC preparation with original questions and full retained course resources. Results describe this practice only, not STAAR readiness, course credit, or mastery of every listed standard.

   Open with a family learner account

   • Not an official TEA test or an exact simulation of every technology-enhanced item type.
   • A short objective check does not establish complete standards mastery; written application needs thoughtful self-review or educator feedback.
   • Virtual and supplied-data tasks support scientific reasoning; they do not establish physical laboratory proficiency.
   • B.5(C) membrane transport is preserved as foundational instruction, not claimed as an eligible expectation in the current Biology assessed-curriculum document.

7. Unit 7 · 1 targeted skill · Untimed

   Bridge: carbon budgets, sinks and sources

   • Calculate and explain a land carbon budget
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   Unit details and family access

   Targeted original instruction for a narrow diagnostic-to-teaching gap, with a worked model, supported practice, independent application and fresh objective checks.

   Supplemental unit for this edition only, separately reviewed for the narrow sampled skill. The initial course diagnostic remains separate. Applications are unscored self/human review, and objective results do not establish mastery, STAAR readiness or course credit.

   Open with a family learner account

   • This bridge does not replace retained course instruction or cover every part of its listed standard.
   • This is not an official TEA assessment. The two-item recheck cannot establish broad proficiency.
   • Writing is saved for self or educator review, not automatically evaluated for quality.

8. Unit 8 · 1 targeted skill · Untimed

   Inheritance lab: read the trait, build the cross

   • Inheritance lab: read the trait, build the cross
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   Unit details and family access

   A saved one-skill instructional clinic with explicit teaching, worked reasoning, public practice and unscored transfer writing.

   Supplemental study, not a secure assessment. The unit diagnostic and reassessment are public learner-controlled practice samples, not evidence of independent growth or retention. Source-backed content review is distinct from optional educator review.

   Open with a family learner account

   • This clinic does not complete the broader course or certify mastery, exam readiness, course credit or retention.
   • Writing is saved for self or optional educator review; no automated or paid AI grading.
   • Paper responses are not separately saved. Generic vocabulary matching is local practice, not tracked subject-specific card sorting.
   • Dihybrid and sex-linked crosses and full meiosis coverage are outside this one-gene clinic.