Fun way to introduce the concept of addition
THIS looks like FUN MATH for lower elementary grades! http://media-cache-ak2.pinimg.com/originals/96/d0/a7/96d0a7fed0c516d996c34dc0dc4b5480.jpg
JPEG image - The numeracy wall - lots of helpful advice - counting in 5's and 10's, 2D and 3D shapes and more! ...
Geometry. Make your students do it themselves for those hands-on kinesthetic learners!
addition chain link
Here's a nice set of posters on equivalent fractions.
936443f9757958d560f2c89761c756b6.jpg 432×721 pixels
1 and 10 more and less using a 100 square
Australian Curriculum - ACMNA073 - Apply place value to partition, rearrange & regroup numbers to at least tens of thousands