7th grade engineering activities

What 7th grade engineering looks like

Six things that turn a build into engineering

1. 1. A real problem with stakes the class can feel.

   “Make it curl” is a craft goal. “A prosthetics lab will prototype one team’s hand” is a problem.

2. 2. Apply, don't recall.

   A second round that only works with the test from the first. If the hand can be finished without testing anything, it isn’t engineering.

3. 3. Group goals with individual accountability.

   The one most build challenges miss: one cutter, one threader, two kids holding the tape. When the group shared a goal and each student answered for a part, 84% of studies found a positive effect; without both, 17% (Slavin, 1991).

4. 4. The teacher leads the thinking.

   The template on the handout doesn’t ask questions. You do. Three at the hand (which joint isn’t bending, what did the pencil tell you, what’s your one change) beat a worksheet of twenty at the desk.

5. 5. A debrief where the class argues it out.

   The build is the setup. The argument afterward, about whose scores hold up when another team does the scoring, is the practice the standards name.

6. 6. A way to see who did what.

   If you can’t tell which student routed the string and which one only taped it down, you can’t teach the design process. You can only admire the hand.

Any hand can wave. This one has to hold a cup for five.

The printable at the end of the next section puts all six on the table, with every card and log the activity uses, ready to copy. Get the sheet →

The robotic hand, rebuilt for 7th grade (MS-ETS1-2)

Time

70 minutes; most teachers run it over two periods. The 45-minute cut: pre-cut the hand outlines from a template and the straws into 2 cm guides, run one build round and the evaluation rotation, and move round two to the next day.

Groups

Fours. With 29 students, seven groups of four and one group of five with a second Evaluator.

Supplies for eight hands

8 sheets of corrugated cardboard (boxes), 48 straws, string, tape or hot glue (teacher-run), scissors, 8 tennis balls, pencils, and cups. About $6.

Standards

MS-ETS1-2 (evaluate competing solutions with a systematic process) with MS-ETS1-4 (a model that generates test data for iteration). The life science it models is MS-LS1-3 (the body as a system of interacting subsystems); the hand is a model of tendons and joints, and the build assesses the engineering, not the biology.

1. 1Teach first, 10 minutesApply

   Everyone lays a forearm on the desk, palm up, and wiggles their fingers while watching the tendons move at the wrist. Name the idea: muscles in the forearm pull tendons that bend the fingers at the joints, and the finger itself has no muscle. Then name the three design variables: where the joints fold, where the straw guides sit, and how many strings pull.

2. 2The problemStakes

   A prosthetics lab needs a low-cost hand that can pick up three objects (a tennis ball, a pencil, a paper cup) and hold each for a count of five, and it has to be adjustable so a different patient can use it. The lab will choose one team’s design to prototype. The criteria: lifts all three objects for five seconds each, one hand, run by one person, with the strings in reach of one hand. The constraints: one sheet of cardboard, six straws, 2 meters of string, and 15 minutes.

3. 3Four roles, one job eachAccountability

   On the sheet, and everyone signs their role’s box. Fabricator and Test Operator swap between rounds.

   • Fabricator

     The only hands on the scissors and the cardboard.

   • Tendon Lead

     Routes every string and straw, and explains which joint it moves before it's glued.

   • Test Operator

     Runs the three-object test, pulls only, and never helps with the other hand.

   • Evaluator

     Scores each test against the criteria on the sheet, including another team's hand at the debrief.

4. 4You lead the thinkingTeacher leads

   Three questions, asked at the hand: Which joint is not bending, and which string should move it? What did the pencil test tell you that the ball didn’t? What is your one change? The hardest part is keeping your hands in your pockets when the thumb won’t close. Let the Tendon Lead find the string.

5. 5Two rounds, so the test has to be usedApply

   Build and run the three-object test, then 4 minutes to change one thing (a joint, a guide, or a string), then retest. The change has to come from the first test’s score: a team that didn’t record which object slipped is guessing at round two.

6. 6The debrief, 12 minutes with a rotationDebrief

   Each Evaluator scores one other team’s hand on the three objects with the same rubric, then the class compares. Which designs picked up the pencil, and what did their joints have in common? Where did the scoring disagree between the team and its evaluator, and who was right? Who on your team routed the string that fixed the thumb? The rotation is the standard: one rubric, used by everyone, is a systematic process (MS-ETS1-2).

7. 7See who did whatSee who did what

   The observation sheet, four behaviors per student: explained a design choice in tendon-and-joint words, tested honestly (no second hand), disagreed with a reason, changed their mind with a reason. You’ll catch about half the room in one period. Cutting time is the quiet stretch, so walk it with the tally.

(When a finger won’t bend, send the team back to their own wrists. The answer was there in minute one.)

The hot glue stays with you. The tendons are theirs.

Five more 7th grade design challenges, by standard

• Our part · We make Missions

  Then the unit has somewhere to go

  Plenty of teachers rebuild these by hand every unit, and it works. A Mission is a teacher-led, whole-class simulation built to the band’s second standard (MS-ETS1-2), the hand’s own: your class becomes the crew, the scenario is built from the design unit you just taught, and the only way through is using it together. Run the hand first, then the Mission, and the unit has a day two.

  You're at the helm, not on the hook.

  Spine-Backed Globster: the design unit, on a reef

  Spine-Backed Globster · Grades 6 to 12 · About 36 minutes · One device per student, plus your projector · Free with a teacher account

  

  An invasive alien creature is wreaking havoc on a coral reef ecosystem off the coast of Taipan. The crew first has to work together to analyze the data and figure out why the creature is causing so many problems, then write a proposal for a solution that eliminates the infestation. The story plays on the projector. The work happens at seven stations (Command, Engineering, Medical, Security, Science, I.T., Operations) and in the arguments between them.

  Every student is assigned to a team, and each team’s work is themed to it, from its own information and challenge to the same problem the rest of the crew is solving. The team gives a student a role in the story and people to lean on while you move between teams. You’re at the helm, asking what the actual problem is, and which solution survives the constraints.

  It’s built to the band’s second standard (MS-ETS1-2), the one the hand is built on, with the first and third alongside (MS-ETS1-1, MS-ETS1-3) and two ecosystem codes (MS-LS2-4, MS-LS2-5), and the vocabulary is the unit’s: criteria, constraints, design solutions, biodiversity, invasive species. Run the hand first, and tell the class why: the reef needs the proposal that scores best against the criteria, and they’ve just learned how to score one fairly. The lesson prepares them. The Mission is what they’re preparing for.

  “It’s been a while since students left my period saying that was the best class ever.”

  Will it work in my room?

  Students join with a class code: no student accounts, no student email, no passwords. Chromebooks, laptops, or tablets, plus your projector. Free for teachers, no credit card. Student data is covered by COPPA and FERPA, and we signed the Student Privacy Pledge. At about 36 minutes, Spine-Backed Globster fits inside a 45-minute period, with time left for the debrief.

  START FREE →

  Communication first, then the design unit's two

  • The Communication MissionA version for every grade, K to 8Run this one first. It gives your class the training to run any Mission in the library.
  • Spine-Backed GlobsterGrades 6 to 12 · About 36 minutesA reef off Taipan, an invasive creature, and a proposal the crew has to write to stop it.
  • InfectionGrades 6 to 9 · About 34 minutesThe hand’s own standard, with area: map infected tissue and remove it without harming healthy cells (MS-ETS1-2).

  What the report shows

  

  Every Mission produces a report for every student, built from what that student did across the whole Mission, on the skills the Mission captured. The six it can capture are Knowledge, Application, Initiative, Collaboration, Critical Thinking, and Resilience. The first two are what a test already sees. The other four are the human skills every school promises. The test shows what they know. The report shows the rest. SEE THE EVIDENCE →

  You taught it. Now find out who can use it.

  Who's behind it

  Mission.io is a research and design organization with one job: make collaborative, active learning something a teacher can run every unit instead of once a semester, and put a report in your hands when it’s over. Over a million students have run a Mission. The research behind them is funded by the National Science Foundation and the U.S. Department of Education’s Institute of Education Sciences, and Mission.io meets ESSA Level II standards, as validated by Instructure.

  7th grade engineering Missions by NGSS standard

  Spine-Backed Globster is one. There are 5 engineering Missions at 7th grade, numbered 7 to 11 below: three built to the middle school engineering standards, and two career Missions that run from 4th grade up with no NGSS code. MS-ETS1-4, which the hand also serves, has no Mission; the hand and two more challenges on this page teach it. Every lesson finally has somewhere to go. Each code links to its standard on nextgenscience.org.

  Engineering design (MS-ETS1)

  Three Missions across the band’s first three standards, and Spine-Backed Globster carries all three. The fourth, MS-ETS1-4, belongs to the hand.

  Engineering design Missions for 7th grade, by NGSS code, with the standard that has none.

  #Number	The standard	Mission	MinutesMin
  7	MS-ETS1-1, MS-ETS1-2, MS-ETS1-3, MS-LS2-4, MS-LS2-5 Define the problem, then evaluate and combine solutions for a reef losing its biodiversity to an invasive species (grades 6 to 12). On this page: 1. The robotic hand, 2. The hydraulic lift, 3. The roller coaster, and 4. The pinball machine.	Spine-Backed Globster	36
  8	6.G.A.1, MS-ETS1-2 Use area and quadrilaterals to map infected tissue and remove it without harming healthy cells (grades 6 to 9). On this page: 1. The robotic hand, 3. The roller coaster, and 4. The pinball machine.	Infection	34
  9	3-5-ETS1-1, 3-5-ETS1-2, MS-ETS1-2, MS-ETS1-3 Design an improvement to each of three islands’ defenses before a tsunami arrives (grades 5 to 8). On this page: 1. The robotic hand, 3. The roller coaster, and 4. The pinball machine.	Tsunami	33
  	MS-ETS1-4 Develop a model that generates data for iterative testing and modification, toward an optimal design	On this page: 1. The robotic hand, 5. The windmill, and 6. The model lungs

  Engineering careers, from 4th grade up

  Two Missions from the career set that run at 7th grade and keep running through 12th. Neither lists an NGSS code; each one is a design problem with real constraints.

  Engineering career Missions that run at 7th grade, with no NGSS code listed.

  #Number	The standard	Mission	MinutesMin
  10	Tunnel through an asteroid with different drill bits before it hits a planet (grades 4 to 12; no NGSS code listed; made with US Synthetic)	Unstoppable Force	34
  11	Pick a route, a landing point, and a first shelter on Mars (grades 4 to 12; no NGSS code listed; made with Hill Air Force Base)	Mission to Mars	45

  START FREEMISSION BRIEF →

  Free teacher account, no card. Start with the Communication Mission, marked Start here in your library, then the Mission for your unit, each after its 5-minute Teacher Preview.

  Also at this grade

  The 7th grade science activities page maps the grade’s science and engineering Missions by NGSS standard, these design Missions among them; the 7th grade STEM activities page rebuilds the paper roller coaster and fixes the hydraulic lift and the pinball machine; and the 7th grade math activities page maps every 7th grade math standard.

Questions 7th grade engineering teachers ask

The 7th grade robotic hand takes 70 minutes. How do I run it in a 45-minute period?

Split it, the way most teachers do: pre-cut the outlines and the straw guides, run one build round and the evaluation rotation, and move round two to the next day. If you’d rather run a Mission that week, Tsunami takes 33 minutes, Infection and Unstoppable Force 34, and Spine-Backed Globster 36, each with room for a debrief. Mission to Mars fills the whole 45-minute period, with no time left for the debrief.

Which 7th grade engineering standards does this page map?

All four in the middle school band. MS-ETS1-1, MS-ETS1-2, and MS-ETS1-3 each have a Mission, and Spine-Backed Globster carries all three. MS-ETS1-4 has no Mission; the robotic hand, the windmill, and the model lungs teach it here.

Does the robotic hand count for the 7th grade body systems unit?

As a model, yes; as an assessment, no. The hand models tendons and joints, the life science in MS-LS1-3, and the teach-first starts at the students’ own wrists. The build assesses the engineering (MS-ETS1-2 and MS-ETS1-4), so check the biology somewhere else.

In the 7th grade hand rebuild, why does another team do the scoring?

Because MS-ETS1-2 asks for a systematic process, and a rubric only becomes one when somebody else can use it. Each Evaluator scores another team’s hand on the same three objects, and the debrief starts wherever the team’s score and the evaluator’s score disagree.

Are these 7th grade Missions aligned to my state's standards, not just NGSS?

Spine-Backed Globster maps to 21 state science sets, Pennsylvania, Wisconsin, and Massachusetts among them, plus North Dakota’s ELA standards. Infection adds North Dakota’s math standards. Each Mission page lists its NGSS codes and its sets.