Hi Cat98:
St. Ambrose primary has on-line resources for spelling which I've found useful:
KS1 (Y1/ Y2) here: www.saintambrosebarlow.wigan.sch.uk/Infant_spellings/infantspelling.htm
KS2 (Y3 - Y6) here: www.saintambrosebarlow.wigan.sch.uk/spellingpage.htm - KS2 spelling pages have on-line quizzes which usually are automatically marked and were a real help for DD1 to review spelling rules (however beware that a few of the quizzes don't work - so you have to check answers yourself).
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Woodlands Junior School literacy pages: resources.woodlands-junior.kent.sch.uk/literacy/index.htm - you'll have to explore a bit to determine what is appropriate for your child - but topics like spelling, plurals, alphabetical order, etc... help to guide you.
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Crickweb has some nice resources:
KS1 www.crickweb.co.uk/ks1literacy.html
KS2 www.crickweb.co.uk/ks2literacy.html
again - like woodlands literacy zone - you'll have to explore a bit to ensure they're working at the right level.
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BBC BITESIZE KS1 (intended for Year 2, but sometimes useful in Year 3, especially if struggling a bit): www.bbc.co.uk/bitesize/ks1/literacy/
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also would recommend introducing from mid to late Y2:
Junior Scrabble (board has words spelled out on one side & normal board on the other) - great to get them thinking about words & spellings.
Boggle - encourages thinking about words/ spellings.
Bananagrams - very similar - but tiles only. We tend to pour these out on the table at the start of the weekend and add words now and then (but girls are older).
HTH