Math(s) Toolkit
Whilst you're here I'd like to share my totally free maths resources as https://mathstoolkit.com.
I made these to be the tools that I want to use in class to help children develop a visual understanding of number. They are interactive and adjustable - for example the 100 squares can go in either direction and start from any number.
I need to improve their screen responsiveness, but they should work well on iPads and desktops.
Please have a look and share!