Math Links
This is a great link that will allow you to use bar modeling to solve math word problems.  This website is also available as an app if you have an iPad:

Thinking Blocks

Here are some videos explaining digi-blocks.  Digi-Blocks are one of the manipulatives that students use in the classroom.  The videos at the site give you some examples of what students are expected to learn and how a math concept can be introduced using concrete materials.

More On Digi-Blocks

 Here is a link to a site using other manipulatives to help students understand math.
 
Learning Math

This next link will take you to a site that lists many math concepts.  When you click on any of the concepts, a web page will come up with videos about that concept.  The videos at this site give examples of the number and operations standard for many different grade levels. 

numbers and operations

Here is a link to the Common Core Standards for Math P-12.  These math standards are what the State of New York expects each child to learn at each grade level.  Scroll through the page to find your student's grade level.

Common Core Standards Page

Here is a website that will help parents if they are confused with the common core standards.  Many of the modules have examples and videos to teach parents about the objective.

Common Core Help Page