3rd grade practice tests
www.tea.state.tx.us/student.assessment/resources/online/2006/grade3/math/3math.htm

5th grade practice tests
www.tea.state.tx.us/student.assessment/resources/online/2003/grade5/math.htm

3rd-5th grade, choose grade level at top or subject on left (math tutorials & games)
www.aaamath.com

Interactive fractions tutorial
www.kidsolr.com/math/fractions.html

Elapsed time
http://marg.mhost.com/MathGr5/elapsedtime.htm

Choose grade level, play any of the games that are not member only
http://www.toonuniversity.com/math.asp

Select a variety of math games
www.coolmath4kids.com

Choose a variety of math word problems and games
www.mathplayground.com