Video 1. What Is a Number System?
Understand the nature of the real number system, the elements and operations that make up the system, and some of the rules that govern the operations. Examine a finite number system that follows some (but not all) of the same rules, and then compare this system to the real number system. Use a number line to classify the numbers we use, and examine how the numbers and operations relate to one another. Go to this unit.
Video 2. Number Sets, Infinity, and Zero
Continue examining the number line and the relationships among sets of numbers that make up the real number system. Explore which operations and properties hold true for each of the sets. Consider the magnitude of these infinite sets and discover that infinity comes in more than one size. Examine place value and the significance of zero in a place value system. Go to this unit.
Video 3. Place Value
Look at place value systems based on numbers other than 10. Examine the base two numbers and learn uses for base two numbers in computers. Explore exponents and relate them to logarithms. Examine the use of scientific notation to represent numbers with very large or very small magnitude. Interpret whole numbers, common fractions, and decimals in base four. Go to this unit.
Video 4. Meanings and Models for Operations
Examine the operations of addition, subtraction, multiplication, and division and their relationships to whole numbers. Work with area models for multiplication and division. Explore the use of twocolor chips to model operations with positive and negative numbers. Go to this unit.
Video 5. Divisibility Tests and Factors
Explore number theory topics. Analyze Alpha math problems and discuss how they help with the conceptual understanding of operations. Examine various divisibility tests to see how and why they work. Begin examining factors and multiples. Go to this unit.
Video 6. Number Theory
Examine visual methods for finding least common multiples and greatest common factors, including Venn diagram models and area models. Explore prime numbers. Learn to locate prime numbers on a number grid and to determine whether very large numbers are prime. Go to this unit.
Video 7. Fractions and Decimals
Extend your understanding of fractions and decimals. Examine terminating and nonterminating decimals. Explore ways to predict the number of decimal places in a terminating decimal and the period of a nonterminating decimal. Examine which fractions terminate and which repeat as decimals, and why all rational numbers must fall into one of these categories. Explore methods to convert decimals to fractions and vice versa. Use benchmarks and intuitive methods to order fractions. Go to this unit.
Video 8. Rational Numbers and Proportional Reasoning
Begin examining rational numbers. Explore a model for computations with fractions. Analyze proportional reasoning and the difference between absolute and relative thinking. Explore ways to represent proportional relationships and the resulting operations with ratios. Examine how ratios can represent either partpart or partwhole comparisons, depending on how you define the unit, and explore how this affects their behavior in computations. Go to this unit.
Video 9. Fractions, Percents, and Ratios
Continue exploring rational numbers, working with an area model for multiplication and division with fractions, and examining operations with decimals. Explore percents and the relationships among representations using fractions, decimals, and percents. Examine benchmarks for understanding percents, especially percents less than 10 and greater than 100. Consider ways to use an elastic model, an area model, and other models to discuss percents. Explore some ratios that occur in nature. Go to this unit.
Video 10. Classroom Case Studies, K2
Watch this program in the 10th session for K2 teachers. Explore how the concepts developed in this course can be applied through case studies of K2 teachers (former course participants) who have adapted their new knowledge to their classrooms. Go to this unit.
Video 11. Classroom Case Studies, 35
Watch this program in the 10th session for grade 35 teachers. Explore how the concepts developed in this course can be applied through case studies of grade 35 teachers (former course participants) who have adapted their new knowledge to their classrooms. Go to this unit.
Video 12. Classroom Case Studies, 68
Watch this program in the 10th session for grade 68 teachers. Explore how the concepts developed in this course can be applied through case studies of grade 68 teachers (former course participants) who have adapted their new knowledge to their classrooms. Go to this unit.
