Present Simple Tense
Go to this link to find out more about the Present Simple Tense. There are also some online exercises at the bottom of the page!
http://www.isabelperez.com/happy/tenses/present_simple.htm
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Present Continuous Tense
Go to this link to find out more about this tense:
http://www.englishclub.com/grammar/verb-tenses_present-continuous.htm
Some online exercises:
http://www.eclecticenglish.com/grammar/PresentContinuous1F.html
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Nouns
A link with an explanation and an exercise (exercise 2. Find the Proper noun)
http://depts.dyc.edu/learningcenter/owl/nouns.htm
Other online exercises:
http://www.englisch-hilfen.de/en/exercises/nouns_articles/uncountable_nouns.htm
http://www.englishexercises.org/makeagame/viewgame.asp?id=6128
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Punctuation
Some worksheets:
http://www.superteacherworksheets.com/punctuation/punctuation-periodquestionmark_WBZWZ.pdf
http://www.superteacherworksheets.com/punctuation/punctuation.pdf
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Alphabetical Order
Some worksheets:
http://www.abcteach.com/free/a/abcsort_newyears1.pdf
http://www.abcteach.com/free/v/volleyball_abcorder.pdf
An online game:
http://www.learningplanet.com/act/abcorder.asp
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Prepositions
Some worksheets:
http://www.superteacherworksheets.com/prepositions/prepositions1_WBZTW.pdf
http://www.english-grammar.at/worksheets/prepositions/prep1.pdf
http://www.english-grammar.at/worksheets/prepositions/prep2.pdf
http://www.english-grammar.at/worksheets/prepositions/prep3.pdf
http://www.english-grammar.at/worksheets/prepositions/prep4.pdf
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Adjectives describe nouns
Here are some more worksheets:
http://www.superteacherworksheets.com/adjectives/alienadjectives_WBFWB.pdf