Grade 3 Math eResources

AAA Math

ABCya (various games for practice by grade level)

Arcademics

Code.org (computer science curriculum)

Cool Math (For Students 12 and under) 

Directions for on-line access to Math in Focus Student Resources

Greg Tang Math Games 

Greg Tang Summer Math Challenge

Khan Academy

iReady Math At-Home Activity Packet

Math Drills (printable resources for many math concepts)

Math Playground

Mr. Nussbaum

Multiplication

Sheppard Software

SplashLearn

Study Island (login information provided by classroom teacher)

xtraMath