Here is a website which has an amazing selection of interactive maths resources to support learning. It has many of the manipulative we would use at school to support learning. Click the picture to visit the website.
In addition to the interactive resources above, this website has Interactive resources to support a variety of areas in the maths curriculum. Although predominately aimed at KS2, this can be used in other year groups too.
The School Run website is fab for explaining mathematical concepts the children will be learning and giving examples of how this will look. Use the tabs at the top of the web page to browse by subject and then area e.g. maths, addition.