Many years ago one of my parents wanted to help his daughter with math at home for extra support so I created Parent Helper. This file can be sent as a parent e-mail or pieces can be photocopied and sent home as you are doing the units.
Unit on place value involving tens
Shows how to represent numbers (pictorially, expanded notation)
Explains how to compare numbers using hundreds chart, number line
How to round numbers to the nearest ten
How to estimate numbers
Includes memory cards for learning to identify numbers
Be sure to check out Parent Helper for Addition and Subtraction, Multiplication and Division and Geometry.