Spelling

Common spelling differences: -ize/-ise, -or/-our, -er/-re

When to double final consonants: stop → stopping, big → bigger

Words that sound the same but have different meanings: their/there/they're

The classic spelling rule: i before e except after c

Letters we write but don't pronounce: knife, psychology, doubt

Word beginnings that change meaning: un-, re-, dis-, pre-, mis-

Word endings that change word class: -tion, -ness, -able, -ly, -ment