Watch this video with your teacher:

http://www.linkslearning.org/Kids/1%5FMath/2%5FIllustrated%5FLessons/3%5FPlace%5FValue/

http://pbskids.org/cyberchase/forreal/108_for_real_hi.html

Wise Up:

http://www.bbc.co.uk/schools/revisewise/maths/number/01_act.shtml

Mystery Picture:

http://www.dositey.com/addsub/Mystery10.htm

Base Ten Blocks: click on the left 10’s or 100’s

http://www.learningbox.com/Base10/BaseTen.html

Write big numbers:

http://www.mathcats.com/explore/reallybignumbers.html

Cyberchase Number Machine:

http://pbskids.org/cyberchase/games/numbersense/machine.html

Rounding:

Sea Shell Rounding:

http://www.janbrett.com/piggybacks/rounding.htm

Rounding flashcards:

http://www.aplusmath.com/Flashcards/rounding.html