Emergency Sub Plans for Middle School Physics: Ready-to-Use Lessons Without a Lab
Every science teacher eventually needs an emergency sub plan.
Sometimes the absence is planned. Sometimes it is not. A practical lesson suddenly cannot go ahead, the equipment you expected to use is unavailable, or you simply need a lesson that another teacher can pick up with very little preparation.
Physics creates a particular challenge here because so much of the subject can be taught through practical investigation. Students might normally measure motion, build circuits, investigate forces, explore waves or collect data from an experiment. Those are valuable experiences, but they are not always the best choice for an emergency lesson, particularly when the substitute teacher is unfamiliar with your equipment, classroom routines or the practical itself.
That is why a well-designed bank of middle school physics emergency sub plans should include lessons that work perfectly well without a laboratory.
Reading passages, graphs, diagrams, worked examples, data analysis, anchor charts, research tasks and carefully structured questions can still give students a substantial physics lesson. Better still, they allow students to practise something that matters enormously in physics: using evidence and quantitative information to explain how the world works.
What makes a good emergency physics sub plan?
A useful emergency physics lesson should pass a simple test:
Could a substitute teacher hand the resource to students and get them started without having to teach the entire physics concept first?
That does not mean the lesson needs to be easy. It means that the scientific background, instructions and expected outcome should be sufficiently clear that students can make progress independently.
A good lesson should also have a definite ending. Students should know what they are expected to complete before the bell, what happens if they finish early and what work needs to be handed in.
This is one reason physics reading passages work particularly well for emergency cover. The passage supplies background knowledge, the questions give students something concrete to do, and a final application question asks them to use what they have learned.
A free example is the Doppler Effect Physics Science Reading Passage. It is designed as a grab-and-go activity, includes teacher and student versions, and is specifically described as suitable for substitute teaching, scientific literacy, extension and lesson filler.
Why physics needs a different kind of emergency lesson
A substitute lesson should not simply be a normal practical with the equipment removed.
Instead, think about which parts of the physics you actually want students to understand.
Suppose the normal lesson is an investigation of friction. The important learning might involve understanding that friction acts against relative motion, comparing sliding and rolling friction, interpreting data and explaining why friction can be helpful in some situations and undesirable in others.
Students do not necessarily have to conduct the experiment during the emergency lesson to work on those ideas.
They could read about friction, analyse a table of measurements, compare surfaces, interpret a graph and explain why changing the surfaces changes the motion.
That can still be genuine physics.
The same idea works for circuits, forces, energy, waves and thermal physics. You can take the conceptual and analytical heart of a practical investigation and turn it into a self-contained lesson.
A 30 to 45 minute quick-cover physics lesson
Sometimes you need something very simple.
For a short emergency lesson, use one physics reading passage, comprehension questions and one final application question.
A good sequence might begin with five minutes of instructions, followed by fifteen to twenty minutes of reading. Students then spend ten to fifteen minutes answering questions and finish with a short explanation or prediction.
For example, after reading about forces, students could answer:
What is the difference between a balanced and unbalanced force?
Then finish with:
Explain what would happen to the motion of a cyclist if the forward force became greater than the opposing forces.
That final question gives students a reason to apply the concept rather than simply copy definitions.
You can find several free physics reading options in the Free Resources area of The Teaching Astrophysicist, including the free Doppler Effect material and other physics resources. The current store also lists free physics materials such as Rollercoaster Physics, the Physics of Fast, and other reading and research resources.
Start with forces and motion
Forces and motion are ideal emergency-sub-plan territory because students can work with them using everyday examples, diagrams and data.
A free Push and Pull Forces reading resource is available through the wider Teaching Astrophysicist collection, with questions designed to move students from recall and vocabulary into cause and effect and prediction. The resource is aimed at approximately ages 11 to 14 and is designed for uses including substitute teaching and lesson filler.
Similarly, the free Friction Forces reading passage provides a way to connect friction to everyday examples such as shoes, bicycle brakes, tyre tread and sports equipment while also addressing energy transfer and efficiency.
For an emergency lesson, you could take either topic and add a simple data task. Give students several fictional measurements for different surfaces. Ask them to identify the pattern, calculate a difference or percentage change where appropriate, and explain what the data suggest.
That introduces something important - physics is not just vocabulary. Physics involves relationships, evidence and quantities.
Keep quantitative thinking in the lesson
There is a temptation to make emergency physics lessons entirely literacy-based because reading passages are easy to prepare.
They are useful, but physics should still feel like physics.
Where appropriate, include a small amount of quantitative thinking.
Students could calculate speed from distance and time. They could compare masses and weights. They could interpret a velocity-time graph. They could identify which object has the greatest kinetic energy based on supplied information. They could calculate electrical energy from a simple dataset. They could compare temperatures or interpret a wave diagram.
The mathematics does not need to be difficult to be worthwhile.
A middle school student who reads a passage about motion and then calculates the average speed from three pieces of information is doing something meaningfully different from a student who only answers vocabulary questions.
You can also give students equations and ask them to decide which quantity should be calculated rather than expecting them to remember every formula during an emergency lesson.
The emphasis should be on using mathematics to understand the physics, not creating a surprise mathematics test.
Use diagrams and models when equipment is unavailable
Diagrams are another powerful substitute for practical equipment.
A lesson about circuits can use circuit diagrams. A lesson about forces can use free-body-style diagrams appropriate to the students' level. A lesson about waves can use labelled wave diagrams. A lesson about reflection can use ray diagrams. A lesson about rockets can use force diagrams and staged diagrams of the vehicle.
This can actually help students who find practical work engaging but struggle to explain what the practical means.
The emergency lesson becomes an opportunity to slow down and represent the physics clearly.
For example, students might be shown two circuit diagrams and asked to predict which bulb would be brighter and why. They could then compare their predictions with supplied measurements.
That is a complete scientific reasoning task without requiring the substitute teacher to build a circuit.
A 45 to 60 minute standard emergency physics lesson
For a more substantial lesson, combine reading with another form of processing.
Students might read about a physics topic, answer the comprehension questions, complete an anchor chart or graphic organizer and then analyse a small dataset.
The sequence could be:
Read → understand → organise → calculate or analyse → explain.
That structure is particularly useful because it gives students several different ways to engage with the material.
My Science Reading Anchor Charts: Graphic Organizer, Main Idea and Key Details are a natural companion to physics reading material. Students could use them to identify the central idea of an article, collect important evidence, organise terminology or connect several related concepts.
For physics, the organizer can also become more analytical. Students could record a variable, its unit, its relationship with another variable and a real-world example.
The aim is not to give students another sheet simply because you need to fill 50 minutes. The organizer should help them make sense of the physics.
Rollercoaster physics makes a particularly good emergency lesson
Rollercoasters are a useful example because they connect several physics concepts without requiring specialist equipment.
Students can explore energy, forces, friction, circular motion and acceleration through a context they are likely to understand intuitively.
The free Rollercoaster Physics Research Project Template is currently available in the Sellfy store. It is designed as a grab-and-go research task and includes teacher and student versions plus a 20-point rubric. It is also explicitly identified as useful for substitute teaching, extension and lesson filler.
A shorter version of the lesson could ask students to read about the physics of rollercoasters and explain how potential and kinetic energy change during a ride.
A longer version could ask students to investigate how friction, mass, speed, height and circular motion affect the design of a rollercoaster.
This is a good example of how a research project can become an emergency lesson without becoming a vague "research the topic" activity.
Research projects work particularly well for longer absences
If you know that your absence may last for several lessons, research project templates become particularly useful.
The problem with open-ended research is that many students do not know what a successful piece of work looks like.
A structured template changes that.
My Physics 30 Science Research Project Templates Complete Set provides 30 different physics research templates covering topics such as density and floating, the Doppler effect, heat, simple circuits, static electricity, lasers, nuclear physics and more.
Each template includes a summary, mathematical connection, engineering or technology connection, scientific vocabulary and critical-thinking questions, with differentiated question options and a 20-point rubric. The store specifically identifies substitute teaching and longer-running lesson filler as uses.
That is particularly useful when you want students to work independently for a longer period.
The substitute teacher does not need to invent the research questions, decide what students should include or create an assessment system. The framework is already there.
A longer sequence can move from reading to research
One of the strongest ways to build an emergency physics lesson is to connect a short reading task to a longer project.
The Physics 10 Physical Science Reading Passages + 10 Research Project Templates is built around exactly this combination. It includes 10 reading passages and 10 corresponding research templates, with topics including the physics of fast, density and floating, nuclear fusion, fluid dynamics, lasers, plasma and particle accelerators. The research templates include mathematical and engineering connections, vocabulary, inquiry questions and a rubric.
This gives you a very useful progression.
During the first lesson, students learn the topic through reading.
During the second lesson, they organise what they have learned and begin investigating the topic more independently.
This also makes an unexpected multi-day absence much easier to handle. You do not have to find a completely different activity each morning.
The physics of rockets provides another useful model
Rockets are a particularly rich emergency-sub topic because they connect forces, motion, gravity, energy, engineering and space science.
The Rockets Physics Focus Unit Bundle includes differentiated reading passages, a research project, infographics, slides, a podcast and assessment questions. The reading passages come at two levels, and the research task includes mathematical and engineering connections involving speed, distance, force, trajectory, propulsion and spacecraft design. The resource is explicitly listed as suitable for substitute teaching.
That gives you several emergency options within one topic.
A short absence might use the reading passages and questions.
A standard lesson could combine the reading with the infographic or slides.
A longer absence could move into the research project.
An early-finisher could explore one of the engineering questions.
That flexibility is exactly what makes a resource useful as an emergency sub plan.
Free resources are particularly valuable when building your emergency folder
You do not need to purchase a huge bundle before you can start preparing.
The current physics area of The Teaching Astrophysicist includes several free resources alongside the paid collection. The store currently lists free physics materials including the Doppler Effect reading passage and research template, Rollercoaster Physics, the Physics of Fast, and space-related physics materials.
The free physics resources are a good starting point for building a small emergency folder.
You might begin with one forces lesson, one motion lesson, one waves lesson and one space physics lesson.
Then gradually add more.
There is no need for the emergency folder to contain 50 complete lessons immediately.
Use data analysis instead of a practical where appropriate
One of the best ways to preserve the scientific character of physics during an emergency lesson is to use experimental data that has already been collected.
Imagine the normal practical is measuring how the extension of a spring changes with applied force.
For the emergency lesson, provide the force and extension data.
Students can plot the results, identify the trend, describe the relationship and perhaps calculate a constant if appropriate to their level.
The normal practical would still have value when you return. Students could then conduct the investigation themselves.
The same approach can work with:
motion and speed
pendulums
circuits
resistance
density
heating and cooling
sound
light
forces
energy transfers
The exact activity will depend on the curriculum and age group, but the principle is consistent - students can analyse scientific evidence even when they cannot collect the data themselves.
That is an especially useful emergency-sub strategy because it keeps the lesson rooted in scientific investigation rather than turning it into generic reading comprehension.
Do not make the substitute teacher run an unfamiliar practical
There is also a practical management reason for this approach.
A substitute teacher may not know your equipment. They may not know where the cables are stored, how your data loggers work or which apparatus should never be left unattended. Even a simple activity can become difficult if something goes wrong.
This does not mean practical science should be removed from your teaching.
It means the emergency folder should include lessons that do not depend on the substitute teacher improvising in the laboratory.
Students can study the theory, analyse experimental results, interpret diagrams, calculate values and make predictions. Then the regular practical can take place when the normal teacher returns.
For emergency cover, reliability is valuable.
Differentiation matters when you are absent
A substitute teacher may not know which students normally need extra support and which students are ready for greater challenge.
Physics reading passages that already include different levels can make this much easier.
The larger Physics 32 Reading Passages + 30 Research Project Templates bundle contains 62 items across 32 physics topics. It includes differentiated versions of five reading topics, with an accessible version aimed approximately at grades 5 to 7 and a more advanced version aimed approximately at grades 8 to 10.
That can be very useful in a mixed-ability middle school class.
Students can remain focused on the same broad physics idea while working with different reading demands.
The substitute teacher does not need to design the differentiation on the spot.
The final ten minutes should still involve physics
One of the easiest ways to improve an emergency sub lesson is to give students a meaningful final question.
Do not let the lesson finish with "complete the questions."
Ask students to explain something.
After studying friction:
Why can friction be both useful and undesirable?
After studying density:
Why can a large steel ship float even though steel itself is denser than water?
After studying waves:
How can changing frequency affect a wave without changing its speed in the same medium?
After studying circuits:
Why does changing the arrangement of components affect the behaviour of a circuit?
After studying rockets:
Why must a rocket produce thrust greater than its weight during part of its launch?
The response might be a paragraph, an annotated diagram, a simple calculation or a Claim-Evidence-Reasoning response.
The important thing is that students have to use the physics they encountered.
Upper elementary physical science
Although middle school should be the primary audience for these emergency physics plans, the same system can be adapted for upper elementary science.
The biggest change should be the amount of scaffolding.
You might use topics such as pushes and pulls, simple machines, states of matter, light, sound, energy or forces.
Give students shorter texts and more visual support. Use simpler questions and ask them to describe what they observe or predict rather than expecting a detailed mathematical analysis.
A short reading about rollercoasters, for example, could become a lesson about pushes, pulls, gravity and energy.
The important thing is to preserve the central idea: students are learning and using physical science rather than simply completing a generic worksheet.
High school physics
At high school level, the same emergency-sub structure can become much more quantitative.
Reading can lead into calculations.
Graphs can become more sophisticated.
Students can interpret experimental data, use equations, compare models, evaluate assumptions or investigate a research question.
My Physics 30 Research Project Templates are particularly useful for this because the templates deliberately include mathematical and engineering connections alongside scientific research and critical-thinking questions.
The Doppler Effect Research Project is another useful example because students can investigate the physics of waves while making connections to radar, ultrasound and astronomy. The resource is available free in the current store and includes student and teacher versions plus a 20-point rubric.
Think in three levels when preparing your emergency folder
A particularly useful system is to prepare three kinds of emergency lessons.
Your quick cover lesson takes approximately 30 to 45 minutes. It might be a single reading passage, questions and a final explanation.
Your standard cover lesson takes approximately 45 to 60 minutes. Add an anchor chart, data-analysis activity, diagram or short calculation task.
Your extended cover lesson can last one or several lessons. This is where a research project becomes useful.
That means you can respond to different situations without rebuilding your planning each time.
The same topic can often work at all three levels.
A friction reading passage provides quick cover.
Friction reading plus data analysis provides standard cover.
Friction reading plus data analysis plus independent research provides extended cover.
That is much more efficient than having a completely different emergency lesson for every timetable.
Build your physics emergency folder gradually
The best time to build emergency sub plans is when you are not having an emergency.
Start with five dependable lessons.
Choose one forces topic, one motion topic, one energy topic, one electricity or waves topic and one broader physics application.
For each lesson, keep the student version, teacher answers and a short substitute instruction page together.
That instruction page should make the logistics obvious. Explain approximately how long the activity should take, what students should complete, where work should be submitted and what early finishers should do.
The less the substitute teacher has to interpret, the better.
It is also useful to keep both printable and digital versions when possible. A substitute teacher might have a class with easy access to computers, while another day may require students to work entirely on paper.
A good emergency lesson can still teach real physics
The purpose of an emergency sub plan is not merely to keep students occupied until the bell.
It should give them something worth learning.
A student analysing friction data is doing physics.
A student calculating speed is doing physics.
A student explaining how a circuit behaves is doing physics.
A student interpreting a wave diagram is doing physics.
A student researching how rockets overcome gravity is doing physics.
That is why reading passages, anchor charts, research project templates, diagrams and data-analysis activities work so well together for emergency physics teaching.
The reading provides the scientific background.
The questions make students process it.
The organizer helps them structure the ideas.
The data task gives them quantitative evidence to analyse.
The research project lets them work more independently.
The final explanation demonstrates whether they can actually use the physics.
The Physics section of The Teaching Astrophysicist includes resources across kinematics, dynamics and forces, energy, momentum, gravitation, fluids, thermal physics, sound, light, electricity, circuits, magnetism and nuclear physics, with smaller and larger bundles available as well.
For teachers who regularly need a wider bank of ready-to-use physics material, the Physics 5 Resources Monthly Subscription provides five physics resources each month across areas such as forces and motion, energy, waves, electricity and magnetism, modern physics and space science.
The point is not to replace practical physics with worksheets.
It is to make sure that when the practical cannot happen, the physics does not stop.
A strong emergency sub plan should feel like a genuine science lesson that happens to be particularly easy for another teacher to deliver. It should be clear, useful, appropriately challenging and ready to go.
And perhaps most importantly, it should be something you would be happy to teach yourself.
Thanks for reading
Cheers and stay curious
Oliver - The Teaching Astrophysicist
