Middle School Science at Home: 59 Standards and No Years

Middle school science is 59 NGSS standards, and NGSS does not tell you which year any of them belongs to. There is no grade 6 science standard, no grade 7 one and no grade 8 one. There is a single 6-8 band, 59 performance expectations deep, and the order is genuinely yours to choose. Every published middle school science sequence is somebody’s decision, not a requirement.

That is the opposite of grade 5, where you could look up one number and get a year. It is more freedom than most parents want at first, and it becomes the best thing about middle school science once you have a plan.

Budget about 90 to 120 hours a year, so roughly 280 to 360 hours across the three years. That is a real step up from the 65 to 95 of the elementary science years.

What the 59 actually are

Grouped by discipline that is 21 life science, 19 physical science, 15 earth and space, and 4 engineering. Which is remarkably even, and is the first argument for not doing one subject a year.

Two numbers in that table are worth staring at. Heredity is 2 standards of 59. If your memory of middle school biology is mostly Punnett squares, NGSS does not share it: neither heredity standard mentions one, and both ask for a model rather than a calculation. Meanwhile evolution is 6, three times the size. The emphasis has moved and it is worth knowing before you buy a curriculum that has not.

How to split three years when nobody tells you

Two arrangements are in wide use. One discipline a year (a life science year, an earth science year, a physical science year, in whatever order) is how most textbooks are packaged, because it is how they are easiest to sell. Integrated, where all three appear every year, is more work to assemble and is what the standards themselves are built for, since the connections run across disciplines constantly.

For homeschool, integrated is worth the extra planning, for three reasons. Interest survives better when a child who dislikes one discipline is not trapped in it for nine months. Half the standards depend on ideas from another discipline, so a pure life science year keeps stopping to teach chemistry anyway. And if a child leaves for school partway through the band, an integrated year leaves them closer to whatever the school is doing than a single-discipline one does.

Here is one arrangement that balances the load and respects the dependencies. It is not the arrangement, because there is no such thing.

The one ordering constraint that is not negotiable is the first row. Chemistry before biology, because MS-LS1-6 and MS-LS1-7 are explicitly about chemical reactions and matter cycling, and teaching them to a child who has not met an atom is teaching vocabulary.

It is the sequel to grade 5

Three of the arguments from grade 5 come back in this band as mechanisms, and pointing that out explicitly is worth doing with the child.

• Matter is made of particles (5-PS1-1) becomes atoms, molecules and chemical reactions (MS-PS1-1 to MS-PS1-6).
• Weight is conserved when you mix things (5-PS1-2) becomes the total number of atoms does not change in a chemical reaction and thus mass is conserved (MS-PS1-5). Same claim, now with a reason.
• Plants get their material from air and water (5-LS1-1) becomes photosynthesis in the cycling of matter and flow of energy (MS-LS1-6). The grade 5 child argued that it is true. The middle school child explains how.

If elementary science was skipped or thin, this is where to spend the first month. A child who does not believe the grade 5 versions cannot learn the middle school ones, and the grade 5 repairs are quick.

The three hard ones

MS-LS4-4, how natural selection actually works

Construct an explanation based on evidence that describes how genetic variations of traits in a population increase some individuals’ probability of surviving and reproducing in a specific environment.

The misconception: that individual organisms change themselves to suit their environment and pass the change on. Read the standard again and notice how hard it works against this: variations in a population, some individuals, probability, a specific environment. Every phrase is load-bearing.

The wrong answer it produces: ask how giraffes got long necks and you get “they stretched to reach the leaves and their babies had longer necks”. It is the same misconception the grade 3 science guide meets in a simpler form, and it survives into adulthood almost universally. Ask a child how a species “decided” to adapt and they will not notice the word is wrong.

The reteach: the variation has to come first, and it has to be visible. Use a population you can hold: fifty paper squares in four colors scattered on patterned fabric, and the child is a bird with ten seconds to pick up as many as they can. Count the survivors by color, breed them (each survivor becomes two), and run it again for six rounds. Nothing changed itself. The proportions changed because some starting variants got eaten less. Then MS-LS4-6 asks for exactly this in mathematical form, so keep the tallies: the graph is the standard.

MS-PS3-4, temperature is not the amount of energy

Plan an investigation to determine the relationships among the energy transferred, the type of matter, the mass, and the change in the average kinetic energy of the particles as measured by the temperature of the sample.

The misconception: that temperature measures how much heat something has. The standard lists mass as one of the variables precisely because that belief leaves it out.

The wrong answer it produces: a cup of boiling water at 100 degrees, and a bathtub of warm water at 40. Which contains more thermal energy? Almost every child says the cup, and so do most adults. The bath wins enormously, because there is vastly more of it. The same child will say a sparkler at 1000 degrees would burn a hole through their hand, and cannot explain why it does not.

The reteach: heat the same mass of water for one minute and two minutes, then heat double the mass for one minute, and record all three. Temperature is the average energy per particle, and total energy depends on how many particles there are. The word average is doing all the work in the standard and children read straight past it. Say it every time. MS-PS3-3, designing a device that minimizes or maximizes thermal energy transfer, is the natural project to hang this on, and it doubles as an engineering standard.

MS-PS1-5 and MS-LS1-7, where the mass goes

Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved. Develop a model to describe how food is rearranged through chemical reactions forming new molecules that support growth and/or release energy as this matter moves through an organism.

The misconception: that mass can be destroyed, or that burning and dissolving make things go away. It is the grade 5 conservation misconception, which does not stay fixed on its own.

The wrong answer it produces: burn a log and ask where the mass went and you get “it burned up”. The best version of this question is a personal one: when a person loses ten pounds, where do the ten pounds go? The usual answers are energy, sweat, or the toilet. The actual answer is that most of it is breathed out as carbon dioxide, which almost nobody guesses and which nobody forgets afterwards.

The reteach: reactions in a sealed bag on a scale. Baking soda and vinegar with the bag closed weighs exactly what it did before, and the bag inflates. Open it and the mass drops, and now the child can say precisely why. Then count atoms in a written equation, both sides, until it is boring. MS-PS1-2 (deciding from data whether a reaction occurred) pairs with this and gives the year its best lab work.

The engineering standards, which grew

The band has four engineering standards, MS-ETS1-1 to MS-ETS1-4, up from the three that covered grades 3 to 5. The extra one, MS-ETS1-4, asks for a model to generate data for iterative testing, which is a genuine step up: the child is no longer just building and improving, they are building something that produces data about itself.

MS-ETS1-1 also adds a phrase that was not in the elementary version: criteria and constraints now have to take into account potential impacts on people and the natural environment. That connects directly to MS-ESS3, which makes a combined project natural.

The practical approach is one substantial design project a year rather than four separate exercises. Good candidates, each of which also covers content standards: a thermal insulation device (MS-PS3-3), a collision-safety design (MS-PS2-1, which names Newton’s third law), and a water filtration or resource-management design (MS-ESS3-3). Three years, three projects, all four standards met and re-met.

How long this actually takes at home

About 90 to 120 hours a year, best as two or three blocks a week rather than daily slices. Where it goes:

• Investigation and building: about 40%. More than elementary, and the equipment gets slightly more serious: a scale that reads to a gram, a thermometer, a hand lens or microscope.
• Explanation, modeling and argument: about 40%. The verbs across this band are overwhelmingly construct an explanation, develop a model, analyze and interpret data. Writing is a real part of the science now.
• Reading and background is the rest, and it is the smallest slice, which surprises people.

What to cut when it runs long. MS-PS4-3 (digitized signals) and MS-ESS1-3 (scale properties of objects in the solar system) are research-shaped and compress. MS-ESS2-6 (atmospheric and oceanic circulation) is hard to do well at home and is the fairest candidate for a lighter treatment. Do not cut the natural selection block, the conservation-of-mass work, or the engineering project.

Readiness check

1. Do they believe matter is made of particles? Not can they say it: do they use it. If dissolved sugar still “disappears”, start with the grade 5 repair.
2. Can they handle a ratio and a rate? This band leans on grade 6 and grade 7 math constantly: density, speed, percent composition, rates of change. Science will feel hard for math reasons if the proportional reasoning is not there.
3. Can they write a paragraph that makes a claim and supports it? Roughly half this band asks for constructed explanations and arguments. A child who can do the practical work but cannot write it up will look like they do not understand it.
4. Have they run a controlled test? If the 3-5 engineering band was skipped, teach fair testing before MS-ETS1-4, which assumes it entirely.

The split-grade case

This band is unusually good for mixed ages, and it is worth exploiting.

• The whole band is one age range. Three children in grades 6, 7 and 8 can do the same content and all be meeting their standards, because there are no grade-level standards to differ. Nothing else in the curriculum offers this.
• Differentiate by the verb, not the topic. Same investigation, but the younger child describes what happened and the older one constructs an explanation with evidence and identifies a limitation. The standards are written as performances, so raising the performance is the whole job.
• A grade 5 sibling loses very little. The elementary standards are the same ideas at lower resolution, so they can sit in on almost everything, do the practical work, and meet their own standard while listening to a harder conversation.

The real constraint is math, not age. Density, rates and percent composition need the proportional reasoning from grades 6 and 7, so a child behind in math should do those calculations with you rather than alone. That is a support decision, not a reason to hold back the science.

Evidence and records for this band

Grades 6 and 8 are testing years in North Dakota (4, 6, 8 and 10) and grade 8 is one in Pennsylvania (3, 5 and 8), though science is usually not the tested subject. Check your own state. Because the standards carry no year, this is also the band where a written scope and sequence earns its keep: without one, nothing tells you which of the 59 you have already done.

Worth keeping:

1. The natural selection simulation with its tallies and graph. Six rounds of counts and a plot of proportion by color. That is MS-LS4-4 and MS-LS4-6 in one artifact, and it is the clearest evidence of reasoning in the band.
2. The sealed-bag reaction, photographed with the scale readings. Before, during and after opening, with the child’s explanation of the third number.
3. One design project a year, documented across its cycle. Criteria and constraints written first, including the impact on people and environment that MS-ETS1-1 now requires, then the tests, the data and what changed.
4. A running checklist of the 59. Unglamorous and the single most useful record in this band, because three years is long enough to genuinely lose track. See what goes in a homeschool portfolio for the rest.

The honest summary

Fifty-nine standards, no years attached, about 100 hours a year for three years. The freedom to order them yourself is real, and the cost of it is that you have to keep a list, because nothing else will tell you what is left.

Chemistry belongs first, because photosynthesis and digestion are chemical reactions. Integrated years beat one discipline a year for a homeschool, mostly because a child who dislikes one subject is not stuck in it for nine months. And heredity is two standards out of 59, whatever your own middle school biology looked like.

Three repairs carry the band. Populations vary first and the environment selects afterwards, so the giraffes never stretched. Temperature is energy per particle, which is why the bath beats the cup. And mass is never destroyed, which is why the sealed bag weighs the same and why the weight a person loses leaves as breath.

The math running alongside is grade 6, grade 7 and grade 8, the previous science year is grade 5, and for a reluctant scientist, homeschooling around your child’s interests is the way in.

Sprout Lessons builds standards-aligned lessons for grades K–12. Start free.

Next Generation Science Standards © 2013 Achieve, Inc. NGSS is a registered trademark of WestEd; this product is not endorsed by WestEd or the lead states. Accessed via the Common Standards Project (accessed 2026-07-16). Standard counts in this guide were taken from that dataset, not written from memory. The three-year arrangement suggested here is our own and carries no endorsement. Not every state has adopted NGSS: check your state department of education for the standards that apply to you.

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