Try these web sites.
http://www.kidsmathgamesonline.com/numbers/meanmedianmode.html
hoodamath.com
http://www.mathgames.com/skill/6.91-calculate-mean-median-mode-and-range
The above web-site is excellent for many math skills. Go the the appropriate grade level (6th) then scroll through to find the area you would like to practice/learn about.
Freerice (choose the subject of pre algebra and then the level (maybe 4 to start, then work your way up)
Mr. Nussbaum (games)
Cool Math
IXL
Khan Academy (choose from various videos for instruction on various math skills)
http://www.kidsmathgamesonline.com/numbers/meanmedianmode.html
hoodamath.com
http://www.mathgames.com/skill/6.91-calculate-mean-median-mode-and-range
The above web-site is excellent for many math skills. Go the the appropriate grade level (6th) then scroll through to find the area you would like to practice/learn about.
Freerice (choose the subject of pre algebra and then the level (maybe 4 to start, then work your way up)
Mr. Nussbaum (games)
Cool Math
IXL
Khan Academy (choose from various videos for instruction on various math skills)