Percentages | Guided Practice
Students will use pictures, counters, and simple grouping to explore the idea that a whole can be split into equal parts. This lesson introduces percentage language in a concrete, playful way through counting, sorting, and identifying "how many out of 100" in a developmentally appropriate way for Pre-K. Guided practice will focus on recognizing larger and smaller groups, making fair shares, and using words like more, less, all, and part.
| Term | Definition |
|---|---|
| whole | All of the things together. |
| part | A piece of the whole. |
| more | A bigger amount. |
| less | A smaller amount. |
| equal | The same amount. |
| percent | How much out of 100; a way to talk about parts of a whole. |
Show a group of classroom objects and ask, "How many do you see?" Then cover part of the set and ask, "How many are still showing?" Model counting and language like all, some, and part.
Count aloud with the teacher, point to objects, and repeat simple comparison words.
Place 6 to 10 counters in front of students. Model splitting them into two equal groups on sorting mats. Say, "We made two parts. Each part has the same amount." Introduce the idea that equal parts are fair shares and connect it to percentage language by saying, "When we divide a whole into equal parts, we are talking about how much of the whole each part has."
Help move counters, count each group, and identify which group has more, less, or the same.
Show a picture card with a set of objects. Ask students to point to "all," then to one part of the set. Model simple questions: "Is this part more or less?" "Are the groups equal?" Use a 100-grid poster briefly to show that percent means parts out of 100 without requiring formal calculation.
Respond by pointing, counting with support, and using words like more, less, all, and equal.
Give each student a small set of counters. Ask them to make one group and then split it into two parts. Support students in telling what they made using a sentence frame: "I have ___ in all. One part has ___."
Create two groups, count each group, and share their thinking with a partner or the teacher.
Invite 2 to 3 students to show their groups. Reinforce that a whole can be shared into parts and that percent is a way to talk about parts of 100 in later grades.
Show work, listen to peers, and repeat key vocabulary.
Review the lesson with a simple chant: "All together is the whole; parts are pieces we can show." Have students point to a whole group and then to one part. End by saying that percent is a special math word for talking about parts of 100, which they will explore more later.
Teacher observation during guided practice and the quick share. Use a simple checklist to note whether each student can count objects, identify a part of a set, compare groups using more/less/equal, and participate in fair sharing with support.