Inside the Compare Elements & Compounds 5E Lesson
The 5E instructional model walks students through five phases: Engage, Explore, Explain, Elaborate, and Evaluate. It flips the traditional lecture-first sequence on its head. Students explore a concept hands-on before you ever explain it, which means by the time you do explain it, they have something to hook the vocabulary onto.
I switched to the 5E model years ago and stopped going back. Kids retain more, ask better questions, and stop staring at me waiting to be told the answer. The Compare Elements & Compounds 5E Lesson is built on this framework from start to finish. Here's how it plays out across the five phases.
🎯 Engage
Day one is a teacher-led hands-on sorting activity. Each small group gets a stack of cards with chemical symbols and chemical formulas on them (H, O₂, H₂O, NaCl, Fe, CO₂, Au, N₂, C₆H₁₂O₆ and more) and a sorting mat with two columns: Element and Compound. Following the teacher directions, they work through the stack as a group and sort each card based on what they can figure out from the symbol or formula alone.
By the end of the period, kids have every card placed, the sorting mat sketched onto their student sheet, and they can explain in their own words how they could tell an element from a compound just by looking at the formula. Nobody has heard a vocabulary lecture yet. That's the point. They're walking into the rest of the unit with a working mental model, not a memorized definition.
What's included in the Engage:
- Teacher directions for the card-sorting activity
- Printable student observation sheet
- Answer key for the discussion questions
- Four learning objective slides (standard verbatim, "Compare and contrast" verb highlighted, "I CAN...", and "WE WILL...")
- An illustrated Chemistry Word Wall in English and Spanish covering the full unit vocabulary
🔬 Explore
The Compare Elements & Compounds Station Lab is the heart of the Explore phase. Students rotate through 8 stations (plus a 9th challenge station for early finishers) over one class period. The Station Lab is split into four input stations (where kids take in new information) and four output stations (where they show what they learned).
The four input stations:
- 🎬 Watch It! — Students watch a short video on the difference between elements and compounds and answer guided questions about chemical symbols and formulas.
- 📖 Read It! — A one-page reading passage at two differentiated levels, with a Spanish version included.
- 🔬 Explore It! — Students physically build models of elements (one color of bead or block) and compounds (two or more colors bonded together) to match given chemical formulas.
- 💻 Research It! — Reference cards with a kid-friendly periodic table, common compounds, and how to read chemical symbols.
The four output stations:
- 📋 Organize It! — A card sort where students place common substances (water, oxygen, gold, table salt, sugar, nitrogen) under Element or Compound and justify their choice.
- 🎨 Illustrate It! — Students draw atomic-level diagrams of one element and one compound side by side and label the atoms.
- ✍️ Write It! — Three open-ended questions in complete sentences (this is where you see who really gets it).
- 📝 Assess It! — A short formative check with multiple choice and a fill-in-the-blank vocabulary paragraph.
Print and digital versions are both included. If you want the full breakdown of what happens at every single station, what students produce, and how to set it up, that's in our dedicated Station Lab post.
→ Read the full Compare Elements & Compounds Station Lab walkthrough 8 stations, materials list, teacher tipsThe Station Lab is included in the full 5E lesson. You don't need to buy it separately if you're getting the whole unit.
📚 Explain
Here's the real payoff of doing the Engage and Explore before the Explain: by the time kids hit this phase, they've already sorted symbols and built models of elements and compounds with their hands. They have a working understanding before you ever start naming things. The discussions get deeper, the questions get sharper, and you spend less time defining and more time pushing their thinking.
The Compare Elements & Compounds Presentation walks 7th graders through the full scope of TEKS 7.6A, one concept at a time. The deck opens with a quick reset on matter itself (anything that has mass and takes up space, made of atoms, existing in three states), then builds the first big idea: elements. An element is a pure substance made of only one type of atom. Elements can't be broken down into anything simpler by ordinary chemical means. Every element is represented by a chemical symbol, which is always one capital letter, sometimes followed by a lowercase letter (S for sulfur, Ne for neon, Au for gold from the Latin aurum). Students see that all 90+ naturally occurring elements live on the periodic table, organized by atomic number and atomic mass.
From there the deck moves into compounds. A compound forms when two or more different elements are chemically combined through a chemical reaction to make a brand new substance with new properties. Sodium (Na) is a soft, explosive metal. Chlorine (Cl) is a poisonous greenish gas. Combine them and you get sodium chloride (NaCl), the salt on your french fries. The deck makes that point hard, because it's the most powerful one in the unit: a compound is not a mixture of its elements. It's a whole new substance with its own identity. Compounds are represented by chemical formulas like H₂O, CO₂, and NaCl, which tell you exactly which elements are bonded together and in what ratio.
Then the lesson tackles the trickiest part of the standard: the relationship between atoms, molecules, and compounds. An atom is the smallest unit of an element that still keeps the element's properties. A molecule is any two or more atoms bonded together. Here's where 7th graders get tangled up: not every molecule is a compound. O₂ is a molecule because it's two oxygen atoms bonded together, but it's not a compound because both atoms are the same element. H₂O is a molecule AND a compound because it's two different elements (hydrogen and oxygen) chemically bonded. The deck includes a built-in sorting activity where students physically place formulas (H₂, O₂, N₂, H₂O, CO₂, NaCl) into the right Venn diagram region to nail this down.
The deck also gives a quick history lesson on Dmitri Mendeleev, the Russian chemist who arranged the elements by atomic weight and similar properties and even predicted elements that hadn't been discovered yet. Kids love that part. It makes the periodic table feel like a detective story instead of a wall poster.
What makes the Compare Elements & Compounds Presentation different from a typical chemistry slideshow is that kids are doing something on almost every slide. It's not a lecture deck. It's a participation deck. "Your answer:" prompts appear on most slides, Brain Breaks reset attention every few slides (one of them has students build new words out of element symbols), and Quick Action INB tasks (element vs. compound sorting, formula-counting, circle-piece matching) show up throughout. Think About It prompts push deeper into bigger ideas like figuring out Mendeleev's missing elements from a data table and explaining the difference between a compound and a molecule to a confused classmate. The deck closes with a Check for Understanding tied back to the Essential Questions: How can we compare and contrast elements and compounds? and How do atoms, molecules, chemical symbols, and chemical formulas help us distinguish them?
The Explain materials in this product include:
- An editable 29-slide Presentation at two differentiated levels (Dependent and Modified), works in PowerPoint or Google Slides
- A guided fill-in-the-blank student notes handout that mirrors the Presentation, with answer key
- A Paper Interactive Notebook (English and Spanish) students cut, fold, and glue into their notebooks
- A Digital Interactive Notebook at both levels with answer keys, for 1:1 classrooms or Google Classroom
The Explain runs across two class periods. The built-in Think About It prompts are where the real discussion happens, so let those breathe.
🛠️ Elaborate
The Elaborate phase is where students stretch what they learned about elements and compounds and put it into a project of their choosing. In this 7th grade chemistry lesson, that's a Student Choice Project board with six different project options plus a "design your own" pathway.
Students might design a baseball-style "trading card" for their favorite element (with its symbol, atomic number, and three real-world uses), build a 3-D model of a common compound and explain how its elements are bonded, write a comic strip where two elements meet and become a compound, or record a short video walking through how to tell an element from a compound just by looking at the chemical formula. There are options for kids who love to write, kids who love to draw, kids who love to build, and kids who love to perform. Whatever the project, the point is the same: students apply atoms, molecules, chemical symbols, and chemical formulas to a real-world artifact instead of a worksheet.
Choice is the whole point. By letting students pick how they show their thinking, you get more authentic work for TEKS 7.6A and you actually get to see what they understand about elements and compounds.
The rubric (the part teachers actually want)
Every project, no matter which option a student picks, is graded on the same 100-point rubric. Five categories at 20 points each:
- Vocabulary (20 pts) — At least four words from the lesson are used in context.
- Concepts (20 pts) — At least two key concepts from the lesson are referenced.
- Presentation (20 pts) — The project grabs attention and is well-organized.
- Clarity (20 pts) — Easy to understand. Free of typos.
- Accuracy (20 pts) — Drawings and models are accurate. The science is right.
The rubric uses a minus / check / plus shorthand on every row so you can grade a stack of projects quickly without re-reading every criterion.
Two differentiated versions in one file
The standard version is for students ready for independent application of element and compound ideas. The Reinforcement version is for students who need additional vocabulary or concept support. Three of the six options are swapped for projects with a tighter vocabulary tie-in, and "design your own" is replaced with "collaborate with the teacher" so kids aren't pitching cold.
✅ Evaluate
The Evaluate phase wraps the unit with a formal assessment. It's not all bubble-in. Several questions hand students chemical formulas and atomic-model diagrams and ask them to identify what's an element, what's a compound, and explain why.
The full assessment has 12 questions across five formats:
- Multiple choice (4 questions) covering chemical symbols, chemical formulas, atoms vs. molecules, and basic periodic table reading
- Hotspot / visual (2 questions) where students circle the compound in a set of particle-model diagrams and identify the chemical symbol of a labeled element
- Multiselect (2 questions) where students pick all of the compounds (or all of the elements) from a mixed list of chemical formulas
- Short answer (2 questions) on how a chemical formula tells you whether something is an element or a compound, and on the difference between a molecule and a compound
- Multipart scenario (2 questions) with a real-world example (a student looking at H₂O, O₂, and NaCl) where students identify the element vs. compound, name each one, and explain how they could tell
A modified version is included for students who need additional support. Fewer multiple-choice distractors and sentence-starter scaffolds on the short-answer items.
If you've taught all five phases, this assessment shouldn't surprise anyone. It's a chance for kids to show you they get it.
How everything fits together
If you want the whole experience (Engage hook, the Station Lab as the Explore, the Explain day with Presentation and interactive notebook, the Student Choice Elaborate, and the Evaluate assessment all in one download), that's the Compare Elements & Compounds Complete 5E Science Lesson.
If you only need the one-day hands-on activity, the Station Lab works as a standalone. Most teachers buy the full 5E because the Station Lab works harder when it's bookended by a strong Engage and a follow-up Explain. But both are honest options.
Get the Compare Elements & Compounds 5E Lesson
Or if you only need the one-day hands-on Station Lab:
(The Station Lab is included in the full 5E Lesson)
Frequently asked questions
Does this cover all of TEKS 7.6A?
Yes. The full standard is addressed across all five phases. Atoms, molecules, chemical symbols, and chemical formulas all get built into the Explore and Explain activities, with the compare-and-contrast verb baked into the sorting and modeling tasks.
What do my students need to know before this lesson?
A basic understanding of matter and atoms from earlier grade-level standards. If your kids can describe what an atom is and know that matter has mass and takes up space, they're ready.
How long does it take to teach?
Done with fidelity, about 10 class periods of 45 minutes each: one day for the Engage, two days for the Station Lab, two days for the Presentation and Interactive Notebook, three days for the Student Choice Project, and one to two days for review and the assessment. A compressed sample plan is included in the file if you need to move faster.
Do I need special supplies?
Just colored beads or interlocking blocks for the Station Lab (3+ colors, 30+ pieces per group) and a stack of index cards or printed formula cards for the Engage. Most teachers already have what they need.
Does this work for digital classrooms?
Yes. Every component has a digital version. The Station Lab is fully digital-ready (Google Slides), the Presentation works in Google Slides, and the Student Choice Projects can be submitted as videos, slide decks, or written work.
Is this 5E lesson aligned to NGSS too?
It aligns with MS-PS1-1 (developing models to describe the atomic composition of simple molecules and extended structures). Built TEKS-first, but the standards overlap.