Place Value, Grade 4 covers large numbers (up to 1 million) and place value.
The first lessons only deal with thousands, or numbers with a maximum of four digits. These are for review and for deepening the students' understanding of place value. It is crucial that the students understand place value with four-digit numbers before moving on to larger numbers. Then, larger numbers will be very easy to study.
We go on to study numbers up to one million, or numbers that have tens or hundreds of thousands. Students write them in expanded form, compare them, add and subtract them, and learn more about rounding.
Lastly, we study briefly the multiples of 10, 100, and 1,000. This lesson prepares the way for some very important ideas that students need when they study multi-digit multiplication (also a fourth grade topic).
I wish you success in teaching math!
Maria Miller, the author