Choose a STEM subject

These six School Connect topic archives already contain educational articles. Topics vary by class and publication year. Check the actual chapter and the current school syllabus before treating an archive entry as today’s official curriculum.

What makes STEM different from simply memorising a formula?

STEM dimension	Student skill	A practical example
Science	Ask testable questions and use observations	Measure how a paper bridge bends under equal loads
Technology	Use a tool or system to solve a problem	Make an organised table of measurements on paper or a computer
Engineering	Design, test, compare and improve	Change one fold in the bridge design and repeat the test
Mathematics	Measure, calculate, compare and explain	Calculate average distance, ratios or differences

STEM learning is strongest when the task involves a genuine question rather than a decoration labelled “science”. For example: “How can we use one sheet of paper to make a bridge that supports a small, safe classroom object across the same gap?” Students can compare two designs, count the supported paper clips and explain why their measured result might vary.

STEM learning pathways by class

Grade range	Useful starting focus	Sample project
Classes 1–3	Counting, length, shapes, living and nonliving things, observation	Build and compare two paper shapes; measure in centimetres
Classes 4–5	Fractions, data tables, habitats, light, everyday materials	Count outdoor shadow lengths at teacher-approved times
Classes 6–8	Ratios, variables, experiments, energy, engineering and coding	Test folded-paper beams and produce a labelled comparison chart
Classes 9–10	Algebra, forces, chemical concepts, biological systems, experimental error	Investigate whether a design improvement holds across repeated trials
Classes 11–12	Functions, probability, models, advanced subject connections	Estimate uncertainty from repeated measurements and discuss limitations

These are illustrative learning routes. Schools may use different curricula; Class 11–12 students also choose different streams. Match activities and chapter resources to the student’s actual prescribed course. For Indian CBSE programmes, use the official CBSE 2026–27 curriculum and your school’s learning plan. The NCERT textbook portal provides official school textbook reference access; School Connect summaries support but do not replace them.

Free School Connect videos, chapters and preparation links

The School Connect free chapter-wise video hub links subject learning and topic practice. Browse an appropriate chapter, read the explanation, watch a suitable linked video and attempt a small set of questions. Free educational resources are not the same as optional paid examination registration.

• Mathematics syllabus and learning pathways — number sense, fractions, measurements and reasoning
• Science syllabus and learning pathways — age-appropriate school concepts and topic practice
• Physics articles and subject learning — use the subject resources appropriate to your class
• Chemistry articles and subject learning — chemical patterns and responsible science education
• Biology articles and subject learning — living systems and evidence-based observation
• Class 5 Maths: number system learning chapter
• Class 5 Science: our solar system
• Robotics in STEM education — concepts and classroom applications
• What is STEM? — introduction to the four subject areas
• AI and coding: free student projects and learning paths
• Classes 1–12 free learning resources hub

For additional space-science inspiration, NASA Kids Science offers child-friendly “play, watch, make and read” routes, while NASA’s lesson activities library groups resources by elementary, middle and high school ages. These are independent educational references, not School Connect examination resources or endorsement of SCO.

Watch and learn: global STEM video lessons

Explore STEM with trusted lessons from NASA, the European Space Agency (ESA) and TED. Watch one video, try its question, then practise with School Connect’s free study materials. Choose the topic and age range that suits you.

Browse videos: use the Previous/Next arrows in each card or slide sideways with your finger on a mobile device. Videos open individually; no autoplay. Captions depend on the publisher.

Source: original publisher videos. For young learners, adults should review age suitability and video-platform controls. If a video cannot play here, use its direct publisher link in the same card.

Two additional short STEM videos

• NASA: Simple Machines in Space — find examples of levers and pulleys in everyday life; NASA classroom resource.
• ESA: Paxi: The Greenhouse Effect — investigate how greenhouse gases affect Earth’s climate; ESA teaching notes.

Continue with School Connect’s free chapter-wise videos, the Classes 1–12 learning hub and the six hands-on STEM projects below.

Six original, low-cost STEM projects to try safely

These activities use ordinary classroom materials and teach repeatable testing. They are educational examples, not instructions to perform hazardous chemistry or electrical experiments. Younger students should work with a teacher or parent. Never experiment with mains electricity, sharp tools, unfamiliar chemicals, dangerous heights or direct solar viewing.

Project 1: Which paper bridge design holds more? (Classes 1–6)

Materials: two identical sheets of paper, two books of the same height, a ruler and a few light paper clips or similar small, safe objects. Arrange the books to create the same 12 cm gap in each test.

1. Lay one sheet flat across the gap and put one paper clip at a time near the middle. Stop before the paper collapses or the objects fall unsafely.
2. Record how many clips it safely held before noticeable sagging; remove the clips.
3. Fold the second sheet into a simple accordion with several parallel folds, and keep the same gap and loading method.
4. Repeat with the same type of clips and compare the counts. If possible, run two further trials of each design.

What to learn: engineering design, controlled variables, shape and stability. The outcome depends on paper thickness, fold dimensions, gap and load placement; do not claim that folded paper always performs better in every configuration. Extension: create a simple bar chart with a label and units such as “number of identical clips”.

Project 2: Track a safe shadow (Classes 3–7)

Materials: a pencil standing upright in a stable holder, paper, ruler and a supervised outdoor shaded-work area. Never look directly at the Sun, even through a lens, camera viewfinder or telescope without appropriate certified protection.

1. Place the upright pencil at one position and mark the end of its shadow on paper at three school-approved times.
2. Measure the shadow length in centimetres each time and record the clock time.
3. Keep the pencil’s height and position the same. Compare the shadow direction and length.
4. Discuss why the Sun’s changing position in the sky creates different shadows during the day; do not mistake the change for the Sun circling Earth.

Worked data example (fictional): 09:00 shadow 18 cm, 12:00 shadow 8 cm, 15:00 shadow 16 cm. The shortest of these three is 8 cm. These measurements are invented to practise chart-reading and are not a forecast for a location or date. Actual solar noon need not be exactly 12:00.

Project 3: Compare the temperature of two surfaces (Classes 6–9)

Materials: two school-approved safe surfaces such as dark and light paper, a teacher-provided thermometer suitable for room-temperature measurements, a notebook and a shaded indoor work area. Do not use hot plates, open flames or high-temperature surfaces.

1. Predict whether the two surfaces will have the same temperature after sitting in the same room for ten minutes.
2. Place the materials side by side without direct heat sources; measure safely using the same device and method.
3. Take two or three measurements for each and record the range. Do not expect paper colour alone to create a reliable temperature difference in a shaded room.
4. Explain measurement uncertainty: hand warmth, room airflow, thermometer resolution and delayed stabilisation may affect results.

What to learn: a scientific prediction should be checked, including results that show little or no difference. An unexpected result is an opportunity to improve the experiment, not a reason to invent a larger effect.

Project 4: Code a simple multiplication-table generator (Classes 6–10)

First, describe the pattern on paper: multiply the selected number by 1, 2, 3, 4 and 5. Then study this beginner Python code in a teacher-approved environment.

number = 7
for i in range(1, 6):
    print(number, "x", i, "=", number * i)

Expected output: 7 × 1 = 7, 7 × 2 = 14, 7 × 3 = 21, 7 × 4 = 28, 7 × 5 = 35. The range stops before 6. Try: change number to 9 and predict the last output (45) before running the program.

This is ordinary programming, not AI. It builds mathematical patterns, repetition, variables and debugging before introducing machine learning.

Project 5: Observe a seed safely (Classes 4–8)

Materials: a familiar, non-toxic school-approved seed such as a bean, a small growing pot with suitable soil, water, ruler and notebook. Wash hands after handling soil, do not eat experimental materials, and avoid unknown wild plants or pesticides.

1. Plant the seed at an appropriate shallow depth under teacher guidance and note the start date.
2. Record observations every two days: sprouted or not, leaf count and height in centimetres if growth is visible.
3. Water consistently without waterlogging. Keep the location stable and note major changes in light or temperature.
4. Make a simple table of day against height, leaving a blank or “not yet sprouted” instead of inventing a measurement.

Extension: repeat with a second seed of the same type to observe natural variation. One seed is not enough to establish a universal effect of growing conditions.

Project 6: Build a data chart and explain uncertainty (Classes 9–12)

Use the following fictional measurements of a pencil length, made repeatedly with a classroom ruler. Results are 14.2 cm, 14.3 cm, 14.1 cm and 14.2 cm.

1. Find the arithmetic mean: (14.2 + 14.3 + 14.1 + 14.2) ÷ 4 = 14.2 cm.
2. Find the range: maximum 14.3 cm minus minimum 14.1 cm = 0.2 cm.
3. Draw a dot plot or simple table, label the axes correctly and state the measurement unit.
4. Explain that repeated readings may vary because of ruler alignment, viewing angle or measurement resolution.
5. Discuss why the range is not automatically the same as a statistical uncertainty or formal instrument accuracy specification.

Extension: compare repeated measurements by two groups using the same pencil and device. Do not alter the original readings to make them fit an expected answer.

The STEM process: a reusable scientific and engineering worksheet

Step	What the student writes	Example for the paper-bridge task
Question	A testable question	Does folding the paper change the number of clips held across a 12 cm gap?
Prediction	What may happen and why	Folding may resist bending under this load
Fair test	What changes and what stays constant	Shape changes; paper, gap and clips remain comparable
Data	Measurements, units and trials	Clip counts on three attempts for each design
Conclusion	What the evidence showed	Compare average count, not just the strongest single attempt
Improve	How the experiment could be better	Use identical loading positions and repeat more tests

A simple seven-day STEM learning routine

Day	Recommended short activity	Output
Monday	Read a free school chapter and state one question	One clear learning objective
Tuesday	Watch a suitable linked learning video or read an example	Explain the idea aloud
Wednesday	Solve five chapter questions and check answers	Short error log with explanations
Thursday	Try one safe paper or classroom STEM project	Measurements with units
Friday	Make a graph, table or written comparison	One evidence-backed conclusion
Saturday	Improve the method or retry a missed question	Document what changed
Sunday	Review what the results do and do not prove	Choose next week’s topic

This is a suggested routine, not an official board or Olympiad schedule. Adapt duration and tasks to a pupil’s class, needs, equipment and teacher’s learning plan. The practice questions below are original exercises, not copied examination questions.

20 original STEM practice questions with worked answers

These questions are written for School Connect readers and are not current SCO Olympiad papers, board examinations or a claim about the question pattern of any particular test. Solve a question first, then study the explanation and try a similar problem.

Classes 1–3: numbers and observation

Question 1. Which tool is suitable for measuring the length of a pencil?

A. Ruler B. Spoon C. Clock D. Thermometer

Correct answer: A. Ruler. A ruler measures length, typically marked in centimetres and millimetres.

Question 2. What number comes next: 3, 6, 9, 12, …?

A. 14 B. 15 C. 16 D. 18

Correct answer: B. 15. Each term increases by three; 12 + 3 = 15.

Question 3. Which of these is a living organism?

A. Brick B. Toy train C. Butterfly D. Glass bottle

Correct answer: C. Butterfly. A butterfly carries out living processes including feeding, growth and reproduction.

Question 4. How many corners does a rectangle have?

A. 2 B. 3 C. 5 D. 4

Correct answer: D. 4. A rectangle has four vertices, also called corners.

Question 5. Two groups contain 5 buttons each. How many buttons altogether?

A. 10 B. 7 C. 15 D. 25

Correct answer: A. 10. Five plus five equals ten.

Classes 4–6: materials and measurement

Question 6. What is the perimeter of a square with side 6 cm?

A. 12 cm B. 24 cm C. 36 cm² D. 6 cm

Correct answer: B. 24 cm. The four equal sides total 4 × 6 cm = 24 cm.

Question 7. Which state of matter has a fixed volume but takes the shape of its container?

A. Gas B. Solid C. Liquid D. Light

Correct answer: C. Liquid. A liquid has approximately fixed volume and flows to fit the container.

Question 8. Which safety rule is correct during a seed-growing classroom investigation?

A. Taste unknown seeds B. Use pesticides without guidance C. Collect unknown plants from roadsides D. Wash hands after handling soil

Correct answer: D. Wash hands after handling soil. Good hygiene and adult-approved materials reduce unnecessary risks.

Question 9. A bridge supports 6 clips, then 8 clips in two safe trials. What is the mean count?

A. 7 B. 8 C. 14 D. 6

Correct answer: A. 7. Add the two counts (6+8) and divide by two: 7.

Question 10. A cube has how many faces?

A. 4 B. 6 C. 8 D. 12

Correct answer: B. 6. A cube has six square faces.

Classes 7–9: scientific reasoning

Question 11. A student wants to test the effect of paper folding on bridge strength. What should change between trials?

A. Paper thickness and bridge gap B. Type of clip and measurement tool C. Only the bridge fold pattern D. All variables simultaneously

Correct answer: C. Only the bridge fold pattern. A fair comparison keeps other variables comparable while changing the design.

Question 12. A car travels 90 km in 1.5 hours at constant speed. What is its speed?

A. 45 km/h B. 90 km/h C. 135 km/h D. 60 km/h

Correct answer: D. 60 km/h. Distance divided by time = 90 ÷ 1.5 = 60 km/h.

Question 13. Which is an example of an engineering improvement cycle?

A. Design, test, measure, revise B. Predict, ignore results, publish C. Copy the strongest team’s claim D. Change every variable and skip measurements

Correct answer: A. Design, test, measure, revise. Engineering tests a design and revises it using observations and constraints.

Question 14. What is the area of a rectangle 8 cm long and 5 cm wide?

A. 13 cm² B. 40 cm² C. 26 cm² D. 80 cm²

Correct answer: B. 40 cm². Area = 8 × 5 = 40 square centimetres.

Question 15. In a closed system, ordinary chemical reactions obey what basic conservation rule?

A. All products weigh more than reactants B. Atoms are created from nothing C. Total mass is conserved D. Every reaction releases heat

Correct answer: C. Total mass is conserved. Atoms rearrange and total mass remains constant in a closed system under ordinary chemistry conditions.

Classes 10–12: mathematics and data

Question 16. A repeated measurement is 14.2, 14.3, 14.1 and 14.2 cm. What is the mean?

A. 14.1 cm B. 14.3 cm C. 14.25 cm D. 14.2 cm

Correct answer: D. 14.2 cm. Sum is 56.8 cm, divided by four: 14.2 cm.

Question 17. What is the derivative of f(x) = 2x² + 5x?

A. 4x + 5 B. 2x + 5 C. 4x² + 5 D. 2x²

Correct answer: A. 4x + 5. Differentiate each term using the power rule.

Question 18. A 50 W lamp runs for 4 hours. Energy used is:

A. 2 kWh B. 0.2 kWh C. 12.5 kWh D. 200 kWh

Correct answer: B. 0.2 kWh. 50 W = 0.05 kW; energy = 0.05 × 4 = 0.2 kWh.

Question 19. One valid conclusion from a trial involving just one seed is:

A. All seeds always grow at that speed B. The chosen soil is universally the best C. The result describes that one seed under the observed conditions D. No further tests are needed

Correct answer: C. The result describes that one seed under the observed conditions. A single observation does not establish general behaviour across seeds and conditions.

Question 20. What does a narrow range of repeated measurements show?

A. That the instrument has no bias B. That the true value is certainly known C. That the physical law must be correct D. That readings were close together, but not necessarily accurate

Correct answer: D. That readings were close together, but not necessarily accurate. Precision is distinct from accuracy; repeated similar readings may still share systematic error.

Frequently asked questions about STEM learning

What does STEM stand for?

STEM stands for Science, Technology, Engineering and Mathematics. These fields connect when learners solve problems using investigation, design and measurement.

Are School Connect STEM learning resources free?

School Connect provides free chapter-wise learning materials, linked educational videos and practice questions. Optional Olympiad registration is a separate process.

Can students in Classes 1–3 learn STEM?

Yes. Counting, observing plants, measuring objects, identifying patterns and paper-based design are useful age-appropriate foundations.

Do students need a laboratory to try the activities on this page?

No. The suggested projects use classroom materials such as paper, rulers, safe clip weights, a pencil or familiar seeds. Supervision and care remain important.

Is the paper bridge experiment always won by folded paper?

Not necessarily. Strength depends on fold geometry, paper type, span and loading. Run repeated fair tests rather than assuming a fixed outcome.

How does maths connect with science?

Measurement, data tables, averages, ratios and graphs help describe observations and judge scientific claims.

What does an engineering design process include?

Define a problem, imagine or sketch a design, construct a safe test, collect evidence, evaluate limitations and improve the design.

What is the difference between an observation and a conclusion?

An observation records what was measured or noticed. A conclusion explains what those results suggest and what they do not prove.

Why should an experiment repeat measurements?

Repeats help identify random variation and mistakes. They do not automatically remove every measurement bias or systematic error.

Can teachers use School Connect free video lessons?

Teachers can select relevant linked videos and reading resources, verify their age suitability and use them alongside approved learning objectives.

Which school syllabus should a CBSE student follow in 2026–27?

Use the official 2026–27 CBSE curriculum for your enrolled class and the prescribed current textbooks. Earlier blog archives may reflect older syllabi.

Where can I find free official NCERT textbooks?

NCERT’s official online textbook page offers class-wise digital textbook access. Respect its copyright and use terms; School Connect guides supplement rather than replace NCERT.

Where can students explore basic coding and AI?

School Connect’s AI & Coding hub links free topic learning, age-banded projects and responsible-use guidance.

Does a STEM activity need to be part of an Olympiad examination?

No. Hands-on investigation, robotics ideas and maths practice are valuable independently of competition registration.

Are the 20 worked questions official Olympiad exam questions?

No. They are original School Connect study exercises, grouped by class stage, and are not official exam papers or current question-pattern guarantees.

Can a student use NASA’s science activities?

NASA provides independent age-grouped science learning materials. Choose an appropriate activity and check the page’s instructions, safety and access conditions.

What is a fair test?

A fair comparison changes the factor being investigated while keeping other important conditions as similar as practical.

How should students record a failed experiment?

Record the result accurately, examine possible causes, describe limits and adjust the next trial. Unexpected evidence should not be replaced by invented measurements.

Are School Connect’s older STEM articles all current official curriculum guidance?

Not necessarily. Verify a post’s publication year and any referenced syllabus against the appropriate official source before relying on dated claims.

How can I start a week of STEM practice?

Choose one chapter and question, read or watch the free lesson, solve a few practice questions, try a safe supervised project and review the evidence.

Choose your next free STEM learning topic

Start with free Class 1–12 learning resources, then choose Maths, Science, or a Physics, Chemistry or Biology article. Learn the concept, solve five questions and write one evidence-based conclusion from a safe task. You can also explore AI and Coding projects for further STEM thinking.

For students interested in optional School Connect Olympiad assessments, read the updated dates and class eligibility guide and the live SCO exam calendar. The free study materials remain useful whether or not a student registers for an exam.