Rhino Toes (K-5) At a glance Students will practice observation and computation skills by looking closely at the toes and feet of two Sumatran Rhinos in their Outdoor Exhibit. Grade(s) K-2, 3-5 Materials 1 student worksheet per student or pair of students take to Zoo Pencil take to Zoo Rhino footprint Chaperone page take to Zoo Goal To learn to observe carefully and use the data gathered to solve mathematical problems Objectives Student will be able to observe and record the number of toes on the foot of a Sumatran rhinoceros Student will be able to collect data through observation and discussion, and Student will be able to analyze data for patterns and draw conclusions about numbers of toes (digits) on rhinos in multiples Math Days: Rhino Toes Grades K-5, May 2009 Page 1 of 9
Academic standards Ohio Academic Content Standards for Mathematics (Grade: Indicators) Kentucky Core Content Mathematics Indiana s Academic Standards for Mathematics Number, Number Sense and Operations (K: 2-5,8,10,11) (1: 10a.,d.,13,16a.) (2: 7) (3: 1,8b) (4: 1a.,11-13) Patterns, Functions and Algebra (K: 4) (1: 4,5) (2: 1,4,6) (3: 1,4) (4: 1,2,5) (5: 1) Data Analysis and Probability (K: 1) (1: 2) (2&3: 1) (4: 1,2) (5: 2) Mathematical Processes (K-2: A, B, E-G) Number Properties and Operations Number Sense MA-(EP-1.1.1) (04-1.1.1) (05-1.1.1) Number Operations MA-(EP-1.3.1) (04-1.3.1) (05-1.3.1) Data Analysis and Probability Data Representations MA-(EP-4.1.2) (04-4.1.2) (04-4.1.3) (05-4.1.2) (05-4.1.3) Algebraic Thinking Patterns, Relations & Functions MA-(EP-5.1.1) Number Sense (K.1.6) (K.1.9) (1.1.1) (1.1.10) (2.1.8) (2.1.12) Computation (K.2.1) (1.2.1) (1.2.4) (2.2.1) (3.2.8) (5.2.1) Problem Solving (1.6.2) (2.6.1) (2.6.2) (3.6.2) (3.6.3) (3.6.4) (4.7.2) (4.7.3) (4.7.4) (5.7.2) (5.7.3) Data Analysis and Probability (4.6.2) (5.6.1) Math Days: Rhino Toes Grades K-5, May 2009 Page 2 of 9
Background Emi, a critically endangered female Sumatran rhinoceros at the Zoo, is the only Sumatran Rhino in history to produce three calves in captivity. Her third calf was delivered in 2007 at the Cincinnati Zoo. The Sumatran rhinoceros is considered one of the most endangered mammals on earth. In the last 15 years, over 50% of the Sumatran rhino population has been lost because of poaching and habitat destruction. Today, around 200 survive in the wild and only 11 in captivity in the world. Three of these live here at the Cincinnati Zoo. Activity Go to the Sumatran Rhino Exhibit (find it on your Zoo map). Ask your students to observe the Sumatran rhinos. Encourage a discussion about what they can observe about the bodies of the rhinos. (They are hairy, have four legs, horns, and are small in size compared to other rhinos.) Allow the students to study the rhino footprint on the sign fastened to the post in front of the exhibit. Discuss what they observe about the footprint (the number of toes, size of foot, etc.) Compare the footprint with what they can see of the rhinos feet. Discuss why it is so interesting to see these rhinos in person. Do they realize how are it is to see Sumatran rhinos in our country (and 3 of only a few in captivity anywhere in the world)? Can the children see the rhino s feet? How would they describe them? If the rhinos aren t on exhibit, look at the lifesize cutout of a Sumatran rhino a little to your left. Complete the Student Pages (part A) at the Zoo and (part B) back at school following the Zoo visit. Assessment Have the students turn in their completed student pages and drawing of Sumatran rhino footprint. Unsatisfactory Student did not complete the worksheet and/or achieved less than 60% accuracy. Satisfactory Student completed all the worksheet and achieved between 60 and 85 % accuracy. Excellent Student completed the worksheet and achieved greater than 85% accuracy. Math Days: Rhino Toes Grades K-5, May 2009 Page 3 of 9
Zoo Math Days: Rhino Toes Student Page Grades K-2 Part A (at the Sumatran Rhino outdoor exhibit see your map) Watch the Sumatran rhinos in their exhibit if the weather is OK for them to be outside. Then look at the footprint of a Sumatran rhino that is fastened to the post in front of their exhibit. If the rhinos are not out, use the footprint on the sign and the full-size cutout of a Sumatran rhino to your left to complete the worksheet. 1. How many toes are there on the footprint? 2. How many toes did you see on the foot of one of the rhinos? 3. How many feet does the rhino have? 4. If there are two rhinos out today, how many toes does the other rhino have on each foot? 5. How many feet does the other rhino have? Draw a picture of a Sumatran rhino footprint. Make sure it has the correct number of toes Part B (back at School): Use the answers from the questions you worked on at the Zoo while you were looking at the Sumatran rhinos to finish this worksheet. 1. How many feet would two rhinos have all together? 2. How many toes do two rhinos have? 3. How did you get that number? Math Days: Rhino Toes Grades K-5, May 2009 Page 4 of 9
Math Days: Rhino Toes Student Worksheet for Grades 3-5 Part A (at the Sumatran Rhino outdoor exhibit see your map) Watch the Sumatran rhinos in their exhibit if the weather is OK for them to be outside. Then look at the footprint of a Sumatran rhino that is fastened to the post in front of their exhibit. If the rhinos are not out, use the footprint on the sign and the full-size cutout of a Sumatran rhino to the left of this exhibit to complete this worksheet. 1. Write the number of toes on one foot of a Sumatran rhino. This is the same number that was on the footprint. 2. How many feet does a Sumatran Rhino have? 3. If you saw two rhinos today, how many toes does the other rhino have on one foot? 4. How many feet does the other rhino have? 5. How many toes does the other rhino have in total? 6. How many toes would two rhinos have together? 7. How many toes are there in total when all three rhinos at the zoo are counted along together? Draw a picture of a Sumatran rhino footprint. Make sure it has the correct number of toes. Math Days: Rhino Toes Grades K-5, May 2009 Page 5 of 9
Part B (Back at School Grades 3-5) Use the information you collected at the Zoo (Part A) to complete the following questions. 1. Write a fraction that compares the number of toes on one rhino with the total number of toes on three rhinos. 2. Scientists call toes and fingers digits. How many digits does a rhino, have on each foot? 3. How many digits does it have in total? Now look at yourself: 1. How many digits do you have on your foot? 2. How many digits do you have on one hand? 3. How many digits do you have in total? 4. Write an equation to show how you got your answer. 5. On another sheet of paper draw a bar graph to show: a) the number of digits on one rhino foot b) the number of digits on a human hand c) the total number of digits on a Sumatran rhino d) the total number of digits on a human being 6. On this paper draw an icon to represent a family of 3 Sumatran rhinos 7. Now construct a graph using your icon to indicate the number of digits represented by: a) one family of 3 Sumatran rhinos b) 3 families of 3 Sumatran rhinos c) 5 families of 3 Sumatran rhinos Math Days: Rhino Toes Grades K-5, May 2009 Page 6 of 9
Zoo Math Days: Rhino Toes Chaperone Page Grades K-2 Part A (at the Sumatran Rhino outdoor exhibit see your map) Watch the Sumatran rhinos in their exhibit if the weather is OK for them to be outside. Then look at the footprint of a Sumatran rhino that is fastened to the post in front of their exhibit. If the rhinos are not out, use the footprint on the sign to complete the worksheet and the full-size cutout of a Sumatran rhino to your left. 1. How many toes are there on the footprint? 3 How many toes did you see on the foot of one rhino? 3 3. How many feet does a Sumatran rhino, have? 4 4. If you saw two rhinos today, how many toes does the other rhino have on one foot? 3 5. How many feet does the other rhino have? 4 Draw a picture of a Sumatran rhino footprint. Make sure it has the correct number of toes. Part B (back at School): Use the answers from the questions you answered at the Zoo while you were looking at the Sumatran rhinos to finish this worksheet. 1. How many toes does one rhino have? 12 2. How many toes do two rhinos have? 24 2. How did you get that number? 12 + 12 = 24 Math Days: Rhino Toes Grades K-5, May 2009 Page 7 of 9
Math Days: Rhino Toes Chaperone Worksheet for Grades 3-5 Part A (at the Sumatran Rhino outdoor exhibit see your map) Watch the Sumatran rhinos in their exhibit if the weather is OK for them to be outside. Then look at the footprint of a Sumatran rhino that is fastened to the post in front of their exhibit. If the rhinos are not out, use the footprint on the sign and the full-size cutout of a Sumatran rhino to the left of this exhibit. 1. Write the number of toes on one foot of a Sumatran rhino (this is the same number that were on the footprint.) 3 2. How many feet does the rhino have? 4 3. If you saw two rhinos today, how many toes does the other one have on one foot? 3 4. How many feet does the other rhino have? 4 5. How many toes does the other rhino have in total? 12 6. How many toes do both rhinos have altogether? 24 7. How many toes are there in total when all three of the rhinos at the zoo are counted together? 36 Draw a picture of a Sumatran rhino footprint. Make sure it has the correct number of toes. Part B (Back at School Grades 3-4) Use the information you collected at the Zoo (Part A) to complete the following questions. 1. Write a fraction that compares the number of toes on one rhino with the total number of toes on three rhinos. 12/36 2. Scientists call toes and fingers digits. How many digits does one rhino have on each foot? 3 3. How many digits does a rhino have in total? 12 Now look at yourself: 1. How many digits do you have on your foot? 5 2. How many digits do you have on one hand? 5 3. How many digits do you have in total? 20 4. Write an equation to show how you got your answer. 5+5+5+5 = 20 5. On another sheet of paper draw a bar graph to show: a) the number of digits on one rhino foot b) the number of digits on a human hand c) the total number of digits on a Sumatran rhino d) the total number of digits on a human being 6. On this paper draw an icon to represent a family of 3 Sumatran rhinos 7. Now construct a graph using your icon to indicate the number of digits represented by: a) one family of 3 Sumatran rhinos b) 3 families of 3 Sumatran rhinos c) 5 families of 3 Sumatran rhinos Math Days: Rhino Toes Grades K-5, May 2009 Page 8 of 9
Math Days: Rhino Toes Grades K-5, May 2009 Page 9 of 9