Place value grids
All of the following resources are interactive and great for teaching online or on an interactive whiteboard. Spending a little time exploring the options allows them to be used to their full potential.
https://www.topmarks.co.uk/Flash.aspx?f=diennesandcoinsv3 - a range of place value grids for 2 or 3-digit numbers in which you can use Dienes or coins
https://www.mathspad.co.uk/i2/teach.php?id=placeValueBlocksTool - using Dienes blocks to build, describe and compare numbers and visualise numbers with up to 10 digits
https://www.mathspad.co.uk/i2/teach.php?id=decimalBlocksTool&r=1 - using Dienes blocks to represent ones, tenths, hundredths and thousandths
All of the following grids include a decimals option and the ability to multiply or divide a number by 10 or 100
https://www.topmarks.co.uk/Flash.aspx?f=MovingDigitCards - shows very clearly the movement of digits in the grid when multiplying or dividing by 10, 100, 1000