My peer Sarah recently shared a several resources that can be used with students on prac. It prompted me to look through my own resources, and share a couple more websites that have some great resources.
One of these is Teachers Pay Teachers, a website with thousands of resources shared by other teachers. Although as the name of the website suggests, some cost money, there are also some great free resources to be found that are very useful.
Another website is this virtual manipulatives resource. It is maintained by McGraw Hill Education, and has tons of different manipulatives, including calendars, base 10 blocks, clocks, attribute blocks and a lot of others. Hopefully some of these will be useful to others on their pracs!