Take ACT Science when your testing program includes it or when a college, program, or scholarship you are pursuing requires it. When you have a genuine choice and no requirement settles the question, weigh the information a Science score would provide against the extra preparation, cost, and testing time.
There is no responsible universal answer that every student should take it, or that nobody needs it now. “Optional” describes a registration policy. It does not describe every institution’s expectations or every student’s situation.
First determine whether the choice is yours
For National testing, students can select from the available test options during registration. International testing also introduced Science choice as part of its changes. State and District testing works differently: the subjects included are selected at the contract level, rather than by each student individually. ACT section-choice guidance
If your school says Science is part of its test day, do not assume a general website headline permits you to leave before it. Ask the coordinator what is included in your administration.
International students should check the country-specific registration instructions. ACT’s international enhancement page separates the September 2025 Science/Composite change from the February 2026 change to the question structure. ACT international timeline
Write your testing program at the top of the decision page. That prevents you from following rules intended for a different route into the test.
Check requirements at the right level
A college’s general admissions page is the starting point. It may not settle requirements for a particular program, scholarship, or applicant category.
Build a small research table:
| Item to verify | What to record |
|---|---|
| Institution and program | The exact school, degree, or scholarship |
| Application cycle | The entry year covered by the policy |
| ACT Science language | Required, recommended, considered, or no stated requirement |
| Score reporting | Whether a report with Science must be sent |
| Source | Official page and date checked |
| Unclear detail | The specific question still needing an answer |
Do not convert “recommended” into “required,” or “not required” into “never considered.” Those phrases mean different things.
If the page only says “ACT accepted,” a useful question is: “For applicants entering in my year and applying to this program, is an ACT Science score required or recommended?” Save the answer with your notes. ACT itself states that Science requirements are institution-specific. ACT guidance on college decisions
Understand what Science changes in the score report
Science does not enter the enhanced Composite. The Composite uses English, Math, and Reading. Taking Science can produce a separate Science score and, with Math, a STEM score. ACT score definitions
For an original illustration, imagine English 27, Math 30, Reading 29, and Science 24. The Composite is the rounded average of 27, 30, and 29: 29. The Science score does not pull that Composite down. Math and Science instead produce a same-administration STEM score of 27.
Now imagine Science were 34. The Composite would still be 29, while the Math/Science average would be 32. The two reported numbers answer different questions.
That does not mean a Science score is invisible to recipients. Do not register on the assumption that an optional section you take will automatically be withheld from every report. Review ACT’s reporting options and the recipient’s policy before sending scores.
Assess the preparation cost with a real sample
Saying “I like science” is useful background, but it is not a timing diagnosis. Work through a current official Science practice section and review how you handled its evidence.
Record which problems occurred:
- Reading a graph’s scale incorrectly.
- Mixing up experimental groups.
- Missing the variable a study changed.
- Confusing a scientist’s claim with supporting results.
- Needing background knowledge you have not learned yet.
- Spending too long understanding one display.
Then distinguish unfamiliar format from deeper skill gaps. If you understand the reasoning after learning the display conventions, a short period of focused practice may be informative. If you need substantial content review and your application schedule is already crowded, the time commitment is different.
Use the ACT score calculator with its named official form. Choose scored-only counts only after excluding that form’s unscored items. Do not treat a result from an unrelated worksheet as an officially converted Science score.
Compare the marginal cost, not the whole testing budget
The current U.S. National fee schedule lists Science as a $5 add-on to the core registration. Confirm the current amount during registration; international and school-managed arrangements should not be priced from this National table. ACT current fees
The larger cost for some students is time. Science adds 40 minutes of standard working time, along with whatever additional logistics apply to the registered test. It also needs some preparation time if you want the result to reflect your skills.
A useful decision compares what you would do with that preparation time otherwise. Would it replace repeated work on skills you already know, or would it displace an urgent Math weakness or an application deadline? Make the tradeoff concrete.
Three example decisions
A requirement settles the question
A student confirms that a target program requires Science for their application cycle. They register with Science and plan preparation around the required section. Their opinion about whether Science is their strongest subject does not remove the requirement.
The remaining choices concern test date, preparation, and reporting, not whether a general “optional” label applies.
No requirement, but useful evidence
Another student has no confirmed Science requirement and is interested in a field involving quantitative research. They can afford the added section and have time for a realistic practice check. They decide to take Science to obtain a separate result.
This is a personal evidence-gathering choice. It is not proof that every student with similar interests must do the same.
No requirement and limited capacity
A third student verifies their relevant policies, faces a packed application month, and has a specific core-section weakness to address. They decide to focus on the required test.
That decision should be documented and revisited if the college list changes. It should not become the claim that Science is useless for everyone.
Avoid four common shortcuts
Do not use a major label as a policy. “STEM applicant” does not tell you every program’s requirements.
Do not let a single practice score decide without context. Timing, familiarity, and the form used can affect what that score means.
Do not confuse Composite protection with reporting secrecy. Science being excluded from the average does not mean colleges cannot receive it.
Do not rely on last year’s advice. Testing and admissions policies can change, especially during a format transition.
Make and record the decision
Before submitting registration, write one sentence explaining your choice: “I am taking Science because…” or “I am not taking Science because…”. Attach the relevant policy notes and set a reminder to revisit them before score submission.
SHSPrep’s ACT program includes lessons, targeted practice, and two original full-length mock tests with raw performance results. The ACT prep overview explains the current scope; use official requirements and a real practice review to guide this registration decision.