Subtraction Math Facts Stamps Designed to meet these objectives: Math • Students will develop proficiency with subtraction facts. • Students will demonstrate understanding and use of standard subtraction algorithms. Reinforce math facts with these fun subtraction fact stamps. The foam stamps are easy to use and great for quickly practicing groups of facts. Use them to create math facts books, fun facts tests, and games— or place them at a math center for independent practice. The possibilities are endless! © 2009 Lakeshore (800) 428-4414 www.lakeshorelearning.com FF313 Ages 6+ Printed in Taiwan What’s Included • 12 foam stamps Getting Started Set out stamps, stamp pads, and plenty of paper. Using Your Stamps Whole-Class Activities • Create a reproducible for each student using the stamp you wish to practice. Give students a time limit and have them try to complete the subtraction sentences as quickly as possible. Check their work as a class. • Have students create math facts journals. Have them start with “-1” and move on to the next set when ready. Have students practice with the stamps each day. Small-Group Activities • Play Subtraction Bingo! Divide students into small groups. Use four of the stamps to make a different bingo sheet for each group. (Stamp the equation sets side by side in one row. Use different stamps on each sheet.) Make master copies for yourself with all of the answers. Have each group work together to complete the subtraction sentences on their bingo sheet. When the groups have finished, call out various answers. If a group finds the answer 2 on their sheet, they circle it. The first group to have four answers in a row horizontally, vertically or diagonally wins. • Place the stamps in a math center for students to practice with. Have students track their progress by placing stickers on a subtraction facts poster to show the facts they have mastered. Meeting Individual Needs ELL • Pair students of different English language abilities together. Have them stamp a set of subtraction facts. Allow them to discuss the answers together. • Have students stamp the subtraction facts you want them to practice. Complete the equations together. Then, have students create an index card for each fact. Have them draw a picture to illustrate the fact. For example, to represent “11 - 2 = 9,” they could draw 11 items and cross out 2. Punch a hole in the top left corner of each card and put them on a ring. Students can keep them at their desks as a reference tool or take them home for extra practice. Reteach/Extra Support • Work with a small group. Provide students with counters they can use to help them find the answer, 3 or encourage them to draw illustrations to help them solve the problems. • After stamping the equations, cut the paper in half, so that students only have to solve 5 of the problems. When students have solved the first 5, let them do the equations on the other half of the paper. • Introduce students to fact families. Discuss which number sentences belong to the same fact family. Have students create index cards with one fact per card. Have them group the fact families together and complete each fact family by writing the corresponding addition fact sentences on each card. Challenge • Have students choose two stamps and stamp them onto a blank piece of paper. Ask them to fill in all of the answers for the subtraction sentences shown. Then, have students create their own practice activity by writing the subtraction equations with a missing number. For example, they might write “10 = 6” or “ - 7 = 3.” Have students write a set of equations for the math fact they are practicing, and then trade with another student. Encourage them to time themselves to see how fast they can complete the equations. • Students can also practice other facts, such as “-11,” “-12,” etc.