Suggestions Please

My students have been working on their place value and most of them can now work with small and large numbers in terms of standard, written, and expanded forms quite well. Very few of them may still need some work on one of those, but overall they are fine.

This past week, in iSucceed Math program, I began to work on their rounding numbers and they are fine up to the hundreds but for larger numbers they really get confused and just look at the number they need to round, rather than look at the number on the right, to determine whether they need to bump that number up or they should keep the number the same.

I have worked with each group on rounding numbers and they practiced, where they created their own 6 or 7 digit numbers and together they round the numbers. Their conversation was very interesting and I had to restrain myself from interjecting by trying to correct spelling words right in front of them. Most of them, occasionally, looked at me for some kind of signs, especially when they needed to argue. We checked them together and that was when they found out whether they were correct or not. I usually gave students practice sheets but thought that if they could create their own numbers it would be better. It went particularly well, I think because each of them contributed to this.

I have used the number lines and the number charts, but are there other tools or games to make it more interesting for them? Perhaps we can create games:):)