Fox Meadow

Places to practice addition and subtraction:

Number Line Addition

Ten Frame

Shell Game

Funky Mummy Addition to Ten

Sum Stacker

Worm Math

Number Bond

Pipe Game

Math Magician

Vector Kids

Number Twins

Addition Attack

Make 15

Cannon Math

Subtraction Blast

Dr. Brain's Robot

Number Monster -Addition

Timernator Addition

Math Baseball

Math Popper

Sum Sense - addition

Sum Sense - subtraction

Subtraction with renaming video 
 
http://www.mathplayground.com/index_addition_subtraction.html 
 
http://www.mathplayground.com/number_bonds_10.html
 
http://www.abcya.com/addition.htm
 

http://www.toytheater.com/number-pattern.php
http://www.abcya.com/connect_the_dots_10.htm

Places to practice money:
U.S. Mint
Money 

Place Value:

Shark Numbers

Dog Bone - finding your way around a 100 chart

Number Sense:

Comparing Numbers

Number Patterns

Spooky Sequence - number sequencing by 1's

Spooky Sequence - number sequencing by 2's

Spooky Sequence - number sequencing by 3's

Spooky Sequence - number sequencing by 5's

Spooky Sequence - number sequencing by 10's

Backward Spooky Sequence - number sequencing backwards by 2's

Backward Spooky Sequence - number sequencing backwards by 5's

Ghost Blasters - even numbers

Ghost Blasters - odd numbers

Telling Time:

Stop The Clock - 1/2 hour intervals

Stop The Clock - 15 minutes intervals

Stop The Clock - 5 minute intervals

Stop The Clock - time to the minute

Stop The Clock 2 - time to the minute

Stop The Clock - matching digital and analog

Bang On Time

Places to practice multiplication:

Vector Kids Multiplication

Multiplication.com - a variety of games

Sum Sense- Multiplication

Speed Grid

Sum Sense - Division

Places to problem-solve and have fun:

Power Lines

Math Challenge

Tangrams

Circus Simon

Number Bubbles

Stacker