Sentence Combining¶

Strategy · All strategies
Evidence · 3 claims (2 for, 1 mixed) · 11 studies (5 review, 4 causal, 1 quant-synthesis, 1 theoretical), q1–q4 · 1 of 11 report an effect size

Description¶

Sentence combining gives learners two or more simple "kernel" sentences and asks them to merge them into a single, more sophisticated sentence using coordination, subordination, relative clauses, appositives, or participial phrases. It is typically taught through modeling (the instructor combines an example while explaining choices), guided practice, and independent application, often within the context of students' own writing rather than isolated exercises.

Design Implications¶

Sentence combining is one of the best-supported writing interventions: meta-analytic evidence shows it reliably improves writing quality, particularly for adolescents A meta-analysis of writing instruction for adolescent students. [+S]. Its mechanism is partly syntactic (building repertoire) and partly cognitive — it forces learners to reason about how ideas relate (cause, sequence, contrast), which is the same reasoning that underlies coherent discourse. It works best as Practice with Modeling and feedback, not as decontextualized grammar drill; traditional formal grammar instruction shows no comparable benefit for writing quality A meta-analysis of writing instruction for adolescent students. [-S].

Context¶

Requirements¶

• Kernel sentence sets with genuinely combinable ideas (shared subjects, logical relationships)
• Instructor modeling of the combining process with reasoning made explicit (Think-Aloud)
• Feedback on student combinations, ideally comparing multiple acceptable versions rather than seeking one "right" answer
• Transfer activities that connect combined sentences to revision of students' own drafts
• Direct instruction in the target structures (coordination, subordination, embedding) with teacher modeling of the combining decision
• Sequenced exercises progressing from kernel pairs to multi-sentence combinations
• Feedback on student combinations, including discussion of why one combination reads better than another
• A bridge to authentic writing: students apply combining in their own drafts, not only in exercises

Constraints¶

• Isolated worksheet practice without connection to authentic writing shows weak transfer to composing A meta-analysis of writing instruction for adolescent students. [~M]
• Overly long or embedded sentences can exceed working memory and reduce readability — combining is not always better; learners need judgment about when to combine [~W]
• For learners already writing complex syntax, routine combining exercises become redundant and can depress engagement Expertise reversal: guidance that helps novices can burden more skilled learners. [~M]
• Exercises detached from real writing tasks show weak transfer; gains in exercise performance do not automatically appear in student compositions [-M]
• Requires some baseline grammatical vocabulary; students with very limited sentence sense may need Accessible Vocabulary & Syntax support first [~M]
• Overuse of formulaic combining can produce inflated, over-subordinated prose; feedback should reward clarity, not sentence length [-W]

Implementation Variability¶

• Open combining: learners choose any grammatically acceptable combination; supports flexibility and discussion of rhetorical effect
• Cued combining: signal words or clause slots are provided; lowers load for novices Chunking reduces working memory load. [+M]
• Kernel-to-paragraph: combining embedded in full-text revision, the form most likely to transfer
• Contrasting cases: comparing a flat vs. a well-combined version makes the stylistic payoff visible Multiple contrasting cases support abstraction. [+M]
• Kernel-to-text: combine sentence pairs, then apply the same moves to the student's own draft
• Peer-assisted combining: pairs negotiate combinations and justify choices; peer discussion adds gains for weaker writers [+M]
• Embedded in genre writing: exercises use kernels drawn from the genre students are currently writing

Target Learners¶

• Adolescent and older writers still producing predominantly simple or run-on sentences A meta-analysis of writing instruction for adolescent students. [+S]
• Students with learning disabilities, for whom structured combining with models and feedback has shown strong gains Saddler & Graham study. [+M]
• Less valuable for proficient writers with established syntactic range Expertise reversal: guidance that helps novices can burden more skilled learners. [~M]
• Struggling and developing writers in upper elementary through secondary grades, who show the largest quality gains [+S]
• English learners, for whom explicit syntactic models make English embedding structures learnable [~M]
• Proficient writers benefit less; exercises may be redundant once syntactic control is automatized [~W]

Target Learning Goals¶

• Syntactic fluency: expanding the range of sentence structures available for composing
• Revision skill: making local edits that improve clarity and cohesion
• Logical relations: recognizing and signaling relationships between ideas (cause, concession, sequence)
• Writing quality: sentence variety, cohesion, and maturity [+S]
• Syntactic awareness: understanding how clause relationships encode meaning
• Reading comprehension: parsing complex sentences in texts improves when students have constructed such sentences themselves [+M]

Instructions¶

1. Present two or three kernel sentences and model combining them aloud, narrating choices ("These show cause, so I'll use because…") (Think-Aloud, Modeling)
2. Compare several acceptable combinations and discuss their different emphases and effects (Non-Examples)
3. Guide learners through cued combinations, then fade cues to open combining (Fading, Scaffolding)
4. Have learners apply combining during revision of their own drafts, with feedback focused on effect, not just correctness (Practice, Feedback)

Related Strategies¶

• Sentence deconstruction — the inverse move; taking complex sentences apart builds the same syntactic awareness
• Strategy instruction in writing — combining functions as one tool within broader composing strategies
• Use sentence construction activities to teach compound, complex, and compound-complex sentence types
• Sentence decombining (sentence splitting) — the inverse move, useful for students whose sentences run on
• Kernel-sentence expansion — a precursor activity for writers not yet ready for combining
• Use syntactic complexity as a sensitive developmental marker to monitor children's writing progress in the upper elementary grades

Examples¶

• Saddler & Graham (2005) — Second- and fourth-grade students, including those with learning disabilities, improved sentence construction and writing quality through combining lessons embedded in writing instruction.
• Graham & Perin (2007) Writing Next report — Identified sentence combining as one of the highest-effect instructional practices for adolescent writers, based on meta-analysis. doi:10.1037/1082-009X.99.3.445
• William Strong's Sentence Combining: A Composing Book — Widely used curriculum built on open combining exercises progressing from kernel pairs to paragraph-level revision.
• The Writing Revolution (Hochman & Wexler) — embeds sentence-combining activities at every grade level as part of its Hochman Method, using content from the curriculum rather than isolated grammar sentences.
• Saddler & Graham's peer-assisted sentence combining — fourth-grade students, including weaker writers, worked in pairs to combine kernels and justify their choices, producing measurable gains in writing quality and revision.
• Sentence-combining workbooks in developmental college writing — programs such as those modeled on Strong's Sentence Combining: A Composing Book use graduated kernel exercises before application to essays.

Key Sources¶

• Graham, S., & Perin, D. (2007). A meta-analysis of writing instruction for adolescent students. Journal of Educational Psychology, 99(3), 445–476. doi:10.1037/0022-0663.99.3.445
• Saddler, B., & Graham, S. (2005). The effects of peer-assisted sentence-combining instruction on the writing performance of more and less skilled young writers. Journal of Educational Psychology, 97(1), 43–54. doi:10.1037/0022-0663.97.1.43
• Andrews, R., Torgerson, C., Beverton, S., Freeman, A., Locke, T., Low, G., Robinson, A., & Zhu, D. (2006). The effect of grammar teaching on writing development. British Educational Research Journal, 32(1), 39–55. doi:10.1080/01411920500401997
• Hunt, K. W. (1965). Grammatical structures written at three grade levels. NCTE.
• Saddler, B., & Graham, S. (2005). The Effects of Peer-Assisted Sentence-Combining Instruction on the Writing Performance of More and Less Skilled Young Writers. Journal of Educational Psychology, 97(1), 43–54. doi:10.1037/0022-0663.97.1.43
• Hochman, J. C., & Wexler, N. (2017). The Writing Revolution: A Guide to Advancing Thinking Through Writing in All Subjects and Grades. Jossey-Bass.