We are working on comparing and ordering numbers from least to greatest and/or greatest to least using place value. Students are comparing numbers written in different forms such as, standard form, unit form, word form, and expanded form. 
Students need to be able to compare them with the < (less than),> (greater than), or = (equal) signs, as well as putting them as a list with commas. For instance, 154 < 415 because 415 has more 100’s than 154. Or 252 > 225 because 252 has 5 tens and 225 only has 2 tens. Students should be able to put 3 numbers in order from least to greatest, for example, 154, 225, 252. This becomes trickier when the numbers are given in different forms. If a student is given numbers in different forms, they should first write the number in standard form before trying to compare numbers. For example, if a student is given : 325, 60+400+8, and 35 tens. The student must first write all the numbers in standard form: 325, 468, 350. Now the student can order them from least to greatest: 325, 350, 468.
Here are some videos that may help.