Joining Clauses With Conjunctions
A 40-minute Grade 3 lesson on simple, compound and complex sentences, and the conjunctions that build them.
Joining Clauses With Conjunctions is a free 40-minute Grade 3 English lesson plan for Common Core standard L.3.1 — use nouns, verbs, adjectives, adverbs and the right subject-verb agreement. It is timed across 5 sections, gives the exact wording to use where the wording carries the mathematics, names 3 misconceptions with the teaching move that addresses each, and ends with an exit ticket and a printable worksheet with its answer key.
- Grade:
- Grade 3
- Length:
- 40 minutes
- Standard:
- L.3.1
Grade 3 · Language
L.3.1
Demonstrate command of the conventions of standard English grammar and usage when writing or speaking.
Objective
Students will be able to join two clauses with a coordinating or subordinating conjunction and say what changed.
Students are successful when they can
- Builds a compound sentence with and, but or so.
- Builds a complex sentence with because, although or when.
- Says what the conjunction claims about the two parts.
What you need
- Clause strips to combine
- Two piles of conjunction cards
- The printable practice sheet linked at the end of this plan
The lesson
Warm-up — two short sentences
5 min- Read four pairs of short sentences aloud in a row.
- Ask how it sounds. Choppy, and the connections are invisible.
Teach — the conjunction makes a claim
13 min- Join two clauses with 'and'. It claims only that both are true.
- Join the same two with 'but'. Now it claims a contrast.
- Join them with 'because'. Now it claims a cause.
- Say that the clauses did not change — the conjunction did all the work.
- Show 'although' moved to the front and the comma that arrives with it.
“Same two facts, three different claims. The conjunction is doing the arguing.”
Guided practice — join six ways
12 min- Pairs take three clause pairs and join each two ways.
- For each, they say what the conjunction claims.
- One pair must be joined with the subordinate clause first.
Independent practice
8 min- Students complete the sentences page.
- It mixes compound and complex sentences.
Close
2 min- Give two clauses. Take three joins and three claims.
What goes wrong, and why
Each of these is a reasoning error rather than carelessness. The fix addresses the reasoning.
Joins everything with 'and'.
Why: It is always grammatical and never claims anything false.
Fix: Ask what the relationship actually is. 'And' hides it; the others state it.
Forgets the comma when the subordinate clause comes first.
Why: The comma rule depends on order, which is an unusual kind of rule.
Fix: If the sentence starts with 'because', 'although' or 'when', there is a comma before the main clause.
Creates a fragment by starting with a subordinate clause and stopping.
Why: 'Because it was raining' feels complete because it answers a question.
Fix: Every sentence needs a main clause. Read it alone and ask whether it stands.
If they are not there yet
- One pile of conjunctions rather than two.
- Give the clause pairs.
If they finish early
- Join three clauses.
- Write the same claim as a compound and a complex sentence.
- Find a place where two short sentences are better than one joined.
Exit ticket
Join these two clauses two ways. What does each conjunction claim?
What to look for: Two claims named. Two joins with the same claim means the what-does-it-claim question needs asking each time.
Printable practice for L.3.1
Free to print and copy, answer key included. Each sheet can generate a fresh set of problems for a retake.
- Verbs and TensesFinish each sentence.
Questions about Joining Clauses With Conjunctions
How long does the Joining Clauses With Conjunctions lesson take?
40 minutes, split across 5 timed sections: warm-up 5 min, teach 13 min, guided practice 12 min, independent practice 8 min, close 2 min. The minutes are stated per section and add up to the stated length, so the plan can be cut or extended at a section boundary rather than abandoned halfway.
Which standard does Joining Clauses With Conjunctions teach?
CCSS.ELA-LITERACY.L.3.1 — L.3.1, Language for Grade 3: “Demonstrate command of the conventions of standard English grammar and usage when writing or speaking.” In plain terms, use nouns, verbs, adjectives, adverbs and the right subject-verb agreement.
What do I need to teach this lesson?
Clause strips to combine, two piles of conjunction cards and the printable practice sheet linked at the end of this plan. Everything listed is either ordinary classroom equipment or a free printable from this site — there is nothing to buy and nothing to prepare beyond photocopying.
What mistakes should I expect in this lesson?
Three, each a reasoning error rather than carelessness: joins everything with 'and'; forgets the comma when the subordinate clause comes first and creates a fragment by starting with a subordinate clause and stopping. The plan gives the thinking behind each one and the teaching move that addresses the thinking rather than the symptom.
How do I know whether the lesson worked?
The exit ticket asks: “Join these two clauses two ways. What does each conjunction claim?.” Two claims named. Two joins with the same claim means the what-does-it-claim question needs asking each time. That tells you whether the class needs a reteach or a thirty-second conversation before you plan tomorrow.
Is there a worksheet to go with Joining Clauses With Conjunctions?
Yes — 1 printable L.3.1 worksheet, linked at the end of the plan and free like the rest of the site. Each one comes with an answer key and 25 versions, so the practice after the lesson can be a different paper on every desk.
Is Joining Clauses With Conjunctions free to use?
Yes. The plan, its printables and their answer keys are free to read, print and photocopy for your own class, with no account and no email capture. It was last reviewed on 7 September 2026. Please do not resell it or republish it as your own.
Last reviewed 2026-09-07. Aligned to L.3.1 of the Common Core State Standards for English language arts.