Place Value | Assessment Review
A short, classroom-ready review lesson that helps students recall place value concepts through quick explanation, guided practice, and partner checks. The lesson connects place value to computer science by emphasizing positional value in number systems, especially decimal and binary representations.
| Term | Definition |
|---|---|
| digit | A single symbol used to make numbers, such as 0-9. |
| place value | The value of a digit based on its position in a number. |
| base-10 | A number system with ten digits, where each place is worth ten times the place to its right. |
| binary | A number system used in computers that has only two digits, 0 and 1. |
| position | The location of a digit in a number that determines its value. |
Write a three-digit number on the board and ask students what each digit is worth. Model one example if needed.
Respond orally or on mini whiteboards and explain how they know the value of each digit.
Review place value in base-10 using a chart. Show how numbers can be expanded into hundreds, tens, and ones. Briefly connect this idea to binary by showing that each position also has a value, but in powers of 2.
Copy the chart, listen, and answer quick questions about digit value in different positions.
Display 4-5 practice questions such as identifying the value of a digit, writing a number in expanded form, and comparing two numbers using place value. Think aloud for the first example.
Work with the teacher to solve each example and explain their reasoning.
Give students a short set of mixed questions. Circulate, support, and correct misunderstandings immediately.
Work in pairs to solve problems, check each other’s answers, and discuss any errors.
Ask a few rapid-fire questions or display exit-style review prompts. Invite students to answer individually before discussing as a class.
Show answers independently and correct work based on class discussion.
Summarize the key idea: a digit’s value depends on its place, and this idea is important in both everyday math and computer science number systems.
Share one thing they remember about place value and one question they still have.
Reinforce that place value tells us what a digit means based on where it appears in a number. End by connecting this idea to computing, where position also matters in systems like binary.