I am going to tell you about unit 4 at a web site it is not a virous i swear.
unit number 1 is geometry and its all about shapes. Like a cube or cone. Some times you have to mesure the shape to find out the answer.
Place value is where you look at ones tens hundred tousands ten thosands hundred thousands millions ten millions hundred millions. and more if she asks you to look at tens you look at the second last number.