Math
Shapes: http://www.primaryresources.co.uk/online/longshape3d.html, http://standards.nctm.org/document/eexamples/chap4/4.2/standalone2.htm
Tangrams: http://pbskids.org/cyberchase/games/area/tangram.html
Fractions: http://www.iknowthat.com/com/L3?Area=FractionGame&COOK=
Probability spinner: http://nlvm.usu.edu/en/nav/frames_asid_186_g_1_t_1.html?open=activities
Print out all kinds of math worksheets at http://superkids.com/ (click on math worksheets) or http://themathworksheetsite.com/ (do addition or subtraction multiple digit without carrying or addition multiple digit with carrying)
Practice double-digit addition or subtraction at http://www.learn4good.com/games/kids/double_digits.htm
Practice adding or subtracting with base ten blocks at http://www.arcytech.org/java/b10blocks/b10blocks.html
Practice counting money at http://www.freemathtest.com/math-Currency.asp or http://fen.com/studentactivities/Piggybank/piggybank.html
Choose things to buy and count the correct money for them at http://www.primarygames.com/Spending%20Spree/start.htm
Solve challenging but fun math puzzles at http://www.oswego.org/ocsd-web/games/Powerlines/powerlines1.html or http://www.oswego.org/ocsd-web/games/SpeedGrid/Addition/urikares.html
Practice telling time to the 1/2 hour at http://www.oswego.org/ocsd-web/games/StopTheClock/sthec1.html or to 15 minutes at http://www.oswego.org/ocsd-web/games/StopTheClock/sthec2.html or to 5 minutes at http://www.oswego.org/ocsd-web/games/StopTheClock/sthec3.html
A fun clock to play with is at http://www.time-for-time.com/swf/myclox.swf
Practice your basic addition, subtraction, and multiplication facts at http://www.factmonster.com/math/flashcards.html
Rainforest Maths: http://www.rainforestmaths.comhttp://www.iknowthat.com/com/L3?Area=L2_Math
Place Value - http://www.learningbox.com/Base10/BaseTen.html
Guess My Number - http://www.mathsisfun.com/games/guess_number.html
Interactive Number Charts - http://www.apples4theteacher.com/math.html#interactivenumbercharts
Interactive Addition/Subtraction - http://www.learn4good.com/games/kids/double_digits.htm
Time -
http://www.teachingtime.co.uk/draggames/sthec2.html
Science
Grow your own plant and learn about the life cycle of plants at:
http://www.bbc.co.uk/schools/scienceclips/ages/7_8/plants_grow.shtml
http://kids.nationalgeographic.com/kids/animals/creaturefeature/
http://www.enchantedlearning.com/dictionarysubjects/plants.shtml
Social Studies
Practice your continents and oceans at http://funschool.kaboose.com/globe-rider/games/game_my_world.html or http://www.softschools.com/social_studies/continents/map.jsp
Play Hangman with continents and oceans at http://www.quia.com/hm/46193.html