Thinking Blocks

http://www.mathplayground.com/tb_addition/thinking_blocks_addition_subtraction.html

Haiku

https://www.myhaikuclass.com/lolson04/third/signup

Area and Perimeter

http://www.sheppardsoftware.com/mathgames/geometry/shapeshoot/PerimeterShapesShoot.htm

http://www.sheppardsoftware.com/mathgames/geometry/shapeshoot/AreaShapesShoot.htm

http://www.mathplayground.com/area_perimeter.html

http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks2/maths/perimeter_and_area/index.html

PARCC Practice

http://nextgen.apps.sparcc.org/math/3-5

Social Studies

http://bensguide.gpo.gov/3-5/index.html