Do your students ever want to just hurry and finish their homework? Your students can use the number line jumping strategy to quickly add two-digit numbers and show their understanding of place value and expanded form in the process.
Students will be able to add two-digit numbers using expanded form and a number line.
The adjustment to the whole group lesson is a modification to differentiate for children who are English learners.
Invite two student volunteers to go head to head and answer a place value question. Explain to the students that whoever answers the question correctly first stays standing and faces another student for the next question. Provide encouragement to students who answer the questions wrong by giving out high fives.
Focus on past knowledge questions relating to identifying place values. Examples: "Tell me the value of 3 in 93 (3 ones). What number is in the tens place in 49 (4)? For 37, which number is greater, the digit in the tens place or the digit in the ones place (tens place)?"
Say, “All those questions focused on place value. Now we will use our understanding of place value to add using a number line."
Allow students to work in partnerships with a sympathetic non-EL student or alongside a peer who speaks the same home language (L1).
Provide students with a few place value questions and encourage them to work together to solve the problems.
Have students turn and talk to an elbow partner, explaining what the word place value means in their own words.
Allow students to explain why a problem was wrong, using sentence frames to support their ideas, such as: "The answer was wrong because ________."