Other
Oxford Dictionaries: Words Ending in Sion, Tion, and Cion
Learn the spelling rules involving when to use an "s," "t," or "c" when adding an "ion" suffix.
Other
Howto Spell: Ible or Able Word Endings
Test your knowledge of -ible and -able suffixes by adding the correct suffix to each word in this eight-question quiz.
Grammarly
Grammarly Blog: I Before E Except After C: 9 Helpful Spelling Rules
This site provides nine important spelling rules and examples. L.9-10.2c Spelling, L.11-12.2 Cap/Punc/Spell
Other
Eclectic English: The Present Continuous Tense the Ing Form of Verbs
Learn how to correctly add the -ing ending to various types of words, and then practice by adding -ing to twenty-two verbs.
Other
Illinois State Univ.: Punctuation Made Simple Dash
How is a dash used in a sentence? "Punctuation Made Simple," answers this question and gives examples to make the concepts easier to grasp.
Dave's ESL Cafe
Dave's Esl Cafe: Verb Forms and Verb Tenses #6: Spelling Ing Forms
Spelling rules and examples for adding the "ing" suffix to the ends of words.