Science • Head-to-head

THSF Science vs Mystery Science

Which Homeschool Science Curriculum Is Right for You?

An honest, side-by-side look at both curricula — real costs, real pros and cons, and a clear “choose this one if…” verdict based on fit, not hype. We don't name a flat winner because the right choice depends entirely on your child.

We compare how each one teaches, not what each one charges — prices change, and a stale figure of ours helps nobody.

Ours is included. Every subject, every child on your account, no per-book or per-child fee — and that covers the planner, the subject tutors and your state's records too. Most curricula are bought one subject at a time, per child, every year.

Choose THSF Science if…

Families who want a real high-school science sequence at home without assembling four separate courses

Choose Mystery Science if…

Busy parents who want science to happen

Side-by-side detail

THSF Science

Included

The Homeschool Factory

Included in every plan

Pedagogyphenomena-first + NGSS-aligned

Parent involvementLow — kid-independent

Religious lensSecular

Age rangeK-12

GradesK – Grade 12

Time per day25-35 min

Strengths

A full K-12 arc: the early grades start with what a child can actually observe — light and shadow, weather, living things — middle school moves into matter, energy, cells and body systems, and high school becomes four named courses
Those four — Biology, Chemistry, Physics, and Earth & Space Science — are named separately so they read properly on a transcript
Built against the Next Generation Science Standards, which are public and free to check rather than a private scope we invented
An interactive periodic table and labelled diagrams the child works with directly, not photographs of somebody else's experiment

Weaknesses

A new curriculum, written this year
No lab kit and no hands-on experiments; this teaches the science, it does not replace a dissection tray or a microscope

Best for

Families who want a real high-school science sequence at home without assembling four separate courses

Worst for

Families whose science year is built around hands-on lab work and field experiments

Mystery Science

—

Pedagogyinquiry + video

Parent involvementLow — kid-independent

Religious lensSecular

Age rangeK-5

Time per day30-45 min

Duration~32 weeks, 60 lessons

Strengths

Open-and-go video lessons
Kid-engaging
Real experiments with household items

Weaknesses

Only K-5
Light scope vs Apologia

Best for

Busy parents who want science to happen

Worst for

Families wanting deep scope and sequence

We quote no prices for either programme. They change, and a stale figure of ours is worse to a parent than none — check each publisher directly.

At a glance

Feature	THSF Science	Mystery Science
Publisher	The Homeschool Factory	Mystery Science
Cost	Included	Check publisher
Pedagogy	phenomena-first + NGSS-aligned	inquiry + video
Parent involvement	low	low
Religious lens	Secular	Secular
Age range	K-12	K-5
Grades	K – Grade 12	—
Time per day	25-35 min	30-45 min
Duration	—	~32 weeks, 60 lessons
Rating	—	—

Common questions

Is THSF Science or Mystery Science better for homeschool Science?

Neither is universally better — it depends on your child and teaching style. Choose THSF Science if: Families who want a real high-school science sequence at home without assembling four separate courses. Choose Mystery Science if: Busy parents who want science to happen. Both are respected options; the right one depends on your family's learning approach and budget.

What is the difference between THSF Science and Mystery Science in teaching approach?

THSF Science uses a phenomena-first + NGSS-aligned approach — families who want a real high-school science sequence at home without assembling four separate courses. Mystery Science uses a inquiry + video approach — busy parents who want science to happen. The pedagogy difference is often the deciding factor: match the approach to how your child naturally learns.

More comparisons

THSF Math vs Singapore MathCompare →THSF Math vs Saxon MathCompare →THSF Math vs Math-U-SeeCompare →THSF Math vs Beast AcademyCompare →THSF Science vs ApologiaCompare →THSF Grammar vs IEW Fix-It GrammarCompare →

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We are not affiliated with either publisher and we do not sell their books. We deliberately quote no prices for them — those change, and a stale figure of ours is worse to a parent than none, so check each publisher directly. No affiliate relationships; no sponsored content. We do not declare a flat winner — fit to your child is the only right answer. Already own one of these? We can turn it into a scheduled course, included in every plan.