Properties of Solutions Lesson Plan (TEKS 5.6C): A Complete 5E Lesson for Solutions & Conservation of Matter

Chris Kesler · 10 min read

Stir a spoonful of salt into a clear cup of water and watch it disappear. To a 5th grader, that's magic. Where did the salt go? It looks gone. The water looks the same as it did before. But take a sip and the salt is right there. That moment of confusion is the entire entry point into TEKS 5.6C.

The salt didn't vanish. The particles spread out evenly between the water particles, too small to see anymore. That's a solution. The trickier idea, and the one this standard cares most about, is that the matter is conserved. Put the cup on a digital scale before you stir, write down the mass, stir until the salt dissolves, weigh it again. Same number. To the gram. The salt didn't go anywhere.

If I were teaching this to 5th graders, I'd let the balance tell them. Don't lecture conservation of matter. Just put a number on the screen and let them watch it stay the same. That's the design behind this 5E lesson for TEKS 5.6C. The verb in the standard is compare and demonstrate, which means kids need to see the properties before and after with their own eyes and put a number on the conservation idea.

⏱ 10 class periods 📓 5th Grade Physical Science 🧪 TEKS 5.6C 🎯 Differentiated for D + M 💻 Print or Digital

Inside the Properties of Solutions 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 the teacher waiting to be told the answer. The Properties of Solutions 5E Lesson is built on this framework from start to finish. Here's how it plays out across the five phases.

🎯 Engage

📷 Engage image — objective slide OR word wall card

Day one is a teacher-led hands-on demo with salt, water, and a digital scale. Each small group gets a sealed water bottle half-full of water, a measured pile of salt on a square of paper, and access to a scale. Following the step-by-step teacher directions, they record the mass before mixing, pour the salt into the bottle, cap it tight, swirl until the salt dissolves, and record the mass again.

By the end of the period, kids have the before-and-after numbers written on their student sheet in their own hand, and they can describe in their own words why the mass stayed the same. 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 of conservation, not a memorized definition.

What's included in the Engage:

Teacher directions for the salt-water mass conservation demo
Printable student observation sheet with before/after mass recording
Answer key for the discussion questions
Four learning objective slides (standard verbatim, "Compare and demonstrate" highlighted, "I CAN...", and "WE WILL...")
An illustrated Solutions Word Wall in English and Spanish covering the full unit vocabulary

🔬 Explore

📷 Explore image 1 — wide shot of Station Lab in action

The Properties of Solutions 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 what a solution is and how matter is conserved when one forms, then answer guided questions.
📖 Read It! — A one-page reading passage at two differentiated levels, with a Spanish version included.
🔬 Explore It! — The hands-on solutions activity where students mix sugar in water, salt in water, and chocolate powder in milk, observe what happens, and record the mass before and after.
💻 Research It! — Reference cards covering examples of solid, liquid, and gas solutions (brass, salt water, natural gas) with explanations of how each is conserved.

The four output stations:

📋 Organize It! — A 12-card sort where students place examples into the solution / mixture / not-a-mixture categories.
🎨 Illustrate It! — Students draw a graphic organizer showing the properties of a substance before and after it dissolves into a solution.
✍️ 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.

📷 Explore image 2 — close-up of featured station (Explore It! or Organize It!)

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 Properties of Solutions Station Lab walkthrough 8 stations, materials list, teacher tips

The 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

📷 Explain image 1 — Presentation slide screenshot

Here's the real payoff of doing the Engage and Explore before the Explain: by the time kids hit this phase, they've already made solutions and watched the mass stay constant on a scale. They have a working understanding before anyone starts naming things. The discussions get deeper, the questions get sharper, and you spend less time defining and more time pushing their thinking.

The Properties of Solutions Presentation walks 5th graders through the full scope of TEKS 5.6C, one idea at a time, with examples on nearly every slide. The deck opens with a quick reset on what a mixture is and then introduces the idea that a solution is a special kind of mixture. The substances are combined so evenly that you can't see the separate parts with the naked eye. The deck then walks through example after example so kids see that solutions come in every state of matter.

📷 Explain image (middle) — Presentation slide screenshot (classification hierarchy, Essential Question, or category comparison)

Students learn that a solution can be a solid (brass is copper plus zinc, evenly mixed, with the same mass before and after), a liquid (salt water is salt plus water, 1 gram of salt plus 8 grams of water equals 9 grams of salt water), or a gas (natural gas is ethane plus butane plus propane, mixed evenly together). The big idea on every example is the same: the substances are still all in there, the mass adds up, and the matter is conserved.

The second half of the unit uses a lemonade example to walk through the properties before and after mixing. Before mixing, the drink mix is a bright yellow grainy powder with a sour taste. The sugar is a white grainy powder with a sweet taste. The water is a clear liquid with no taste. After mixing, the lemonade is a yellow liquid that tastes sweet and sour. Some properties stayed (the color, the sour taste) and some changed (the mix is now a liquid). But the mass before equals the mass after, every time. The deck closes with the takeaway that solutions can also be separated back to their original parts (usually by evaporation) without a chemical change, because the matter is still all there.

📷 Explain image 2 — Presentation slide screenshot

For every example, students see the substances going in, what the solution looks like, and the mass math. That repetition (different substances, same conservation rule) is what bakes the compare properties and demonstrate conservation verbs of TEKS 5.6C into long-term memory.

What makes the Properties of Solutions Presentation different from a typical chemistry slideshow is that kids are doing something on almost every single 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, Quick Action INB tasks (identifying solutions versus mixtures, matching descriptions to solutions) show up throughout, and Think About It prompts push deeper into bigger ideas like Texas aquifers with too much salt and using math to figure out how much chocolate mix you need for 20 grams of chocolate milk. The deck closes with a Check for Understanding tied back to the Essential Questions: How do you compare properties before and after mixing, and how does the evidence prove that matter is conserved?

The Explain materials in this product include:

An editable 31-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

📷 Elaborate image — Student Choice Project board or sample student work

The Elaborate phase is where students stretch what they learned about solutions and conservation of matter and put it into a project of their choosing. In this 5th grade physical science lesson, that's a Student Choice Project board with six different project options plus a "design your own" pathway.

Students might design and document their own custom solution (lemonade with measured masses, before and after), or build a poster that walks a 3rd grader through how salt and water can mix without the salt disappearing. 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 solutions and conservation of matter 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 5.6C and you actually get to see what they understand about solutions and conservation.

The rubric (the part teachers actually want)

Every project is graded on a clean 5-category rubric so you can grade a stack of projects quickly without re-reading every criterion. The rubric uses a minus / check / plus shorthand on every row.

Two differentiated versions in one file

The standard version is for students ready for independent application of solutions and conservation. 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 a described scenario with before-and-after masses and ask them to explain whether matter was conserved and how they know.

The full assessment has 12 questions across five formats:

Multiple choice (4 questions) covering definitions, examples of solutions, and the difference between a solution and a non-solution mixture
Hotspot / visual (2 questions) where students circle the image that shows a solution and describe what changed and what stayed the same
Multiselect (2 questions) where students pick all the properties of a substance that stay the same in a solution
Short answer (2 questions) on how a balance proves conservation of matter and why a solution is still technically a mixture
Multipart scenario (2 questions) with a real-world problem (identifying three unlabeled solutions, figuring out an unknown mass given conservation) where kids show their reasoning

A modified version is included for students who need additional support. Fewer multiple-choice distractors, 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 Properties of Solutions 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.

Two options

Properties of Solutions Complete 5E Lesson cover

Full 5E Lesson — ~10 class periods $13.20 Get the 5E Lesson

Properties of Solutions Station Lab cover

Just the Station Lab — 1–2 class periods $7.20 Get the Station Lab

What you need to teach Properties of Solutions (TEKS 5.6C)

Materials beyond what's in the download:

A digital scale (the kitchen kind that reads to the gram) for the conservation demo
Small sealed water bottles or jars with tight lids for the salt-water mass test
Salt, sugar, and chocolate powder (or drink mix) for the solutions activity
Cups of warm water and clear cups for mixing and observing
Small shallow dishes for the evaporation demonstration (left out for a few days)
Pencils, colored pencils or markers, and printed student pages
A device with internet for the Watch It! station and the slide deck

Standard covered: Texas TEKS 5.6C — Compare the properties of substances before and after they are combined into a solution and demonstrate that matter is conserved in solutions; and See the full standard breakdown →

Grade level: 5th grade science

Time: About 10 class periods of 45 minutes each, done with fidelity. The product also ships with a compressed sample unit plan if you need to move faster.

Common misconceptions this lesson clears up

"When salt dissolves in water, it disappears"
The salt doesn't disappear. It breaks into particles too small to see and spreads out evenly through the water. The proof? Take a sip. The salt is right there. Or let the water evaporate over a few days and watch the salt come back, sitting in the bottom of the dish. It was there the whole time, just invisible.
"The salt water weighs less than the salt and water did separately"
The mass before and the mass after are exactly the same. If 50 grams of water and 5 grams of salt go in, you get 55 grams of salt water out. Every time. Every gram of matter that started in the cup is still in the cup. That's conservation of matter, and a digital scale will prove it on demand.
"Solutions and mixtures are different things, solutions aren't mixtures"
A solution IS a mixture. It's just a special kind of mixture where one substance dissolves so completely into another that it looks like one liquid. Salt water is a solution and a mixture. Sand water is a mixture but not a solution (because the sand doesn't dissolve). All solutions are mixtures, but not all mixtures are solutions.
"Once salt dissolves, you can't get it back"
You absolutely can get it back. Pour the salt water into a shallow dish and leave it out for a few days. The water evaporates and the salt is left sitting in the bottom of the dish, white and grainy, exactly like it started. The salt was always still salt. It was just spread out among the water particles, waiting for the water to leave.

What's included in the Properties of Solutions 5E Lesson download

📷 Inside-the-product — add screenshot of Read It passage or sample answer sheet

When you buy the Properties of Solutions Complete 5E Lesson, you get a single download with the whole unit:

✅ Engage materials — teacher directions, student observation sheet, answer key, four learning objective slides, illustrated Solutions Word Wall (English + Spanish)
✅ The full Station Lab — 8 stations + 1 challenge, print and digital, two reading levels, Spanish Read It!
✅ Explain materials — editable 31-slide Presentation at two differentiated levels (with built-in Brain Breaks, Quick Action INB tasks, and Think About It prompts), guided fill-in-the-blank student notes handout with answer key, Paper Interactive Notebook (English + Spanish), Digital Interactive Notebook at two levels with answer keys
✅ Elaborate (Student Choice Projects) — 6 project options + design-your-own, plus a Reinforcement version with vocabulary-focused alternatives, 5-category rubric included
✅ Summative assessment — full 12-question version and modified version with sentence-starter scaffolds, both with answer keys
✅ Sample unit plan — day-by-day pacing guide

A couple of real-talk tips from running this lesson

1. Use sealed containers for the mass demo.

If kids stir salt into an open cup of water on the scale, drops splash, the mass dips, and the lesson gets confusing. Pour the salt in, cap the bottle tight, swirl gently to dissolve. Same number every time. That's the whole point.

2. Start the evaporation demo on day one.

Set a small dish of salt water near a sunny window when you start the unit. By the time you hit the day on "can solutions be separated," the water is gone and the salt is sitting there. Hold up the dish and you've made the case.

3. Save 10 minutes at the end of the Station Lab day for a class debrief.

Ask: "If I tell you 30 grams of water and 5 grams of sugar make 35 grams of sugar water, what does that prove?" That five-minute conversation is the bridge to the Explain day.

Get the Properties of Solutions 5E Lesson

Buy the full Properties of Solutions 5E Lesson — $13.20

Or if you only need the one-day hands-on Station Lab:

Buy the Properties of Solutions Station Lab — $7.20

(The Station Lab is included in the full 5E Lesson)

Frequently asked questions

Does this cover all of TEKS 5.6C?

Yes. The full standard is addressed across all five phases, with the "compare before and after" and "demonstrate matter is conserved" verbs baked into the Engage demo, the Station Lab, and the Student Choice project.

What do my students need to know before this lesson?

A basic understanding of mixtures and physical properties from TEKS 5.6A and 5.6B. If your kids can describe what a mixture is and use a balance to measure mass, 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 conservation 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.

Do I need special supplies?

A digital kitchen scale that reads to the gram is the key tool. Beyond that, just salt, sugar, water, a few sealable jars or bottles, and small dishes for evaporation. Easy and cheap to put together.

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 most directly with 5-PS1-2 (measuring and graphing quantities to provide evidence that regardless of the type of change, the total weight of matter is conserved). Built TEKS-first, but the standards overlap heavily.