Recognize usage errors occurring within context (e.g., double negatives, troublesome words: {to/too/two, their/there/they're, lie/lay, sit/set, leave/let, learn/teach}). SPI 0501.1.4

Links verified on 8/31/2014

1. Affect and Effect - explanation and five sample questions, grade available
2. Can or May - explanation and five sample questions, grade available
3. Commonly Confused Words - seven words (two pairs and a triplet) to review
   1. Quiz on Commonly Confused Words - take this quiz after reviewing the words above
4. Confusing Verbs - Lay / Lie - Read the sentence, and then choose the answer, and get your score instantly!
5. Double Negatives - a Quia quiz
6. Double Negatives Quiz - ten multiple choice questions
7. Double Negatives Test - Correct each sentence omitting or changing one of the negatives. There should be at least two correct ways to express each sentence.
8. Easily Confused Words - This section will help you review and strengthen your knowledge of easily confused words. The 30 exercises are grouped into beginner, intermediate, and advanced levels. Determine your level of knowledge and then select an exercise from the lists at the site.
9. How Does the Effect Affect You? - [designed for grade 9] lesson followed by questions to answer on paper
10. Is It Farther or Further? - [designed for grade 9] lesson followed by questions to answer on paper
11. Lay or Lie - explanation and five sample questions, grade available
12. Leave and Let - explanation and five sample questions, grade available
13. Lie and Lay - Whatever - [designed for grade 9] lesson followed by questions to answer on paper
14. Sit or Set - Does it Matter? - [designed for grade 9] lesson followed by questions to answer on paper
15. Sit or Set Quiz - Complete the sentences using the proper form of "sit" or "set." [This expired link is available through the Wayback Machine Internet Archive. If the page doesn't load quickly click on Impatient? at the bottom right of the page.]
16. Review of troublesome words
    1. There there - Click on the buttons to select the correct answer
    2. They're/their/there - Click on the buttons to select the correct answer (a different quiz)
    3. To / Two / Too - Learn the difference between the homophones to, two, and too. (a Quia quiz)
    4. To / Two / Too - (2) Learn the difference between the homophones to, two, and too. [one question per page]
    5. To, Too and Two - After clicking "Score and Show Answer(s)", click the "Try another set" button at the bottom to get a new set of questions.
    6. Two, Too, and To - Who Knew? - [designed for grade 9] lesson followed by questions to answer on paper
17. Words Commonly Confused - links to eighty different activities