Encourage your child to count everything. Make it fun, for example you can count the steps form the door to the end of your garden. While practicing writing numerals pay attention to the place value (meaning which number comes first).
Teach your child to distinguish between tens and ones. Numicon is great for that. Simply try to make a number line from 0 to 20 using numicon shapes. Talk about which numicon pieces to use, what do you notice (we have all the tens at the top and different ones at the bottom, each number starting from 11 has them both).
Click here to view it on amazon
Click on the picture to view it on amazon.
This link is for a pack of 10. I like this particular hundred square because it has wipeable blank grid at the back. It will help your child to write their own hundred square. I couldn't find a single one from this brand, so please talk to your friends and get them together.
Click on the picture to view it on amazon.