Apple Marks
About This Worksheet
This worksheet helps first graders identify odd numbers by placing an X on the correct apples growing on a tree. Students work with the numbers 20 through 40 while practicing an important early number classification skill. An odd number cannot be divided into two equal groups because one is left over. For example, 31 becomes an odd number because it leaves one extra when paired, while 30 is even because it divides equally. The colorful tree theme encourages students to stay engaged as they practice.
Curriculum and Grade Alignment
This worksheet is appropriate for Grade 1 students who are extending their understanding of even and odd numbers into larger counting ranges. Learners should already recognize and read numbers through at least 40 before beginning. Practicing with two-digit numbers builds confidence and supports later work with multiplication and place value. The activity supports the concepts leading toward CCSS.MATH.CONTENT.2.OA.C.3 and aligns with TEKS 1.2.A by strengthening number relationships. It reinforces mathematical reasoning through repeated classification.
Student Tasks
On this worksheet, students will look at every numbered apple on the tree before deciding whether it is odd or even. They place an X on each apple that contains an odd number. Students continue checking each apple until the entire tree has been completed. When finished, they can review the pattern to confirm that only odd numbers were marked.
Common Challenges and Misconceptions
Some students may confuse neighboring numbers because they move through the activity too quickly. Others may accidentally place an X on every other apple without reading the numbers. A few learners may think numbers ending in zero are odd because they are larger. Remind students to check the last digit carefully before deciding whether to mark each apple.
Implementation Guidance
Teachers can use this worksheet as independent practice after introducing even and odd numbers during whole-group instruction. It also works well for small-group intervention or math centers focused on number patterns. Parents can encourage children to explain why each marked apple is odd before moving to the next one. Repeating this reasoning helps children develop stronger mathematical thinking.
Details and Features
The worksheet features a large illustrated apple tree filled with clearly labeled apples. The numbers are spaced neatly to give students room to mark their answers without confusion. The printable page is ideal for classroom lessons, homework, or homeschool review. Its engaging design keeps the focus on identifying odd numbers while making practice enjoyable.