Comprehensive Year 1 resources challenging pupils to decide between adding '-s' or '-es' to form plural nouns, a core KS1 Grammar, Punctuation and Spelling objective. Materials build strong reasoning skills by requiring pupils to apply the correct spelling rule based on the word ending, supporting deepening understanding. This consolidation activity is vital for achieving spelling mastery in pluralisation as required by the national curriculum. The CS Grammar, Punctuation and Spelling Scheme provides structured comparison practice.