This resource is designed for 4th-grade students to review concepts of place value and rounding in a concise 10-minute session. The lesson utilizes individual whiteboards and printed place value charts to engage students actively. Beginning with a 'Mystery Number Game,' students are prompted to deduce numbers based on given place values. The session emphasizes the importance of understanding place value through a structured 'Place Value House' exercise, followed by quick checks for understanding with interactive questions. Rounding techniques are taught using clear rules: rounding up when the digit to the right is 5 or more, and staying the same when it's 4 or less. Guided practices lead students to round various numbers to the nearest ten and hundred, with real-life applications discussed to illustrate the value of rounding in everyday scenarios. The lesson concludes with a competitive 'Rounding Race' and an 'Exit Ticket' challenge that encourages critical thinking and justification of their answers.