Todd County Middle School · OSEU 1 · Math

Inquiry Design Model (IDM) Blueprint™ “Where my percentage comes from” | OSEU 1: Lands & Environment Compelling How was my percentage of my ancestors’ land calculated? Question • OSEU: Standard 1.1 – Identify changes from the historic land base to the contemporary nine-reservation South Dakota land base of the Oceti Sakowin, and analyze the causes and implication of those changes. Math Standards and Math Practices: 5.NBT.A.1 Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and _1_ of what it represents in the place to its left 5.NBT.A.3a Read, write, and compare decimals to thousandths. Read and write decimals to thousandths using base-ten numerals, number names, and expanded form, e.g., 347.392 = 3 × 100 + 4 × 10 + 7 × 1 + 3 × (1/10) + 9 × (1/100) + 2 × (1/1000). 5.NBT.B.7 Add, subtract, multiply, and divide decimals to hundredths, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Standards and 5.NBT.B.6 Find whole-number quotients of whole numbers with up to four-digit dividends and two-digit divisors, using Practices strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models. MP1 Make sense of problems and persevere in solving them. MP2 Reason abstractly and quantitatively. MP5 Use appropriate tools strategically. MP6 Attend to precision. MP7 Look for and make use of structure. MP8 Look for and express regularity in repeated reasoning. Staging the Discuss if any of the students have acreage and as “Ever wonder how the number of acres you have Question was calculated?” Supporting Question 1 Supporting Question 2 Supporting Question 3 Can you determine how much land How much land does student get six How was the land first distributed? each ancestor had after one generations later? generation? Formative Performance Task Formative Performance Task Formative Performance Task Identify in the number of acres each Divide original allotment and add Continue dividing and adding the person was allotted from a copy of the together. land together through the Dawes Act. generations all the way down to our fictitious student. Featured Sources Featured Sources Featured Sources Copy of the Dawes Act The completed family tree created Video “Land as free as Air with Joseph Family tree created in class. in class. Marshall III” under OSEU #1. Summative Argument Final answer of how many acres the student has is correct. Performance Task Extension Find out how much that acreage is worth. Taking Informed Action