Presentation on theme: "The Power of 10 Getting Back to Basics.... The Power of 10 Today, you will have the opportunity to reflect on your own attitude toward math and how you."— Presentation transcript:
Counting What is counting: to name the numbers in order, to determine an amount Why practice counting: demonstrate verbal sequence, 1:1 correspondence, keep track, knowing the last number indicated represents the total amount
Counting “hiding” dots: 1.use 5 dots and a bush cutout 2.choose how many will “hide” 3.count and compare the dots hiding dots
Counting number studies: students will represent numbers in 5 different ways: dots, 10 frame, digit, tallies, and fingers these may be part of the students’ math or daily journals, used as references around the room, or part of a class book
Counting & Subitizing What is subitizing: the ability to quickly connect a number to a set without counting Why practice subitizing: speeds up process of determining an amount, precursor to operations
Counting & Subitizing Perceptual Subitizing: recognizing a set (1-6) WITHOUT any grouping (e.g. knowing it’s 4 without having to count)
Counting & Subitizing baseball: use a deck of dot cards (1-6) 1.flash a dot card to the 1 st hitter 2.quick answers = hit (go to 1 st base) 3.slow/no answer = strike 4.keep flashing cards to advance the runners *practice PERCEPTUAL subitizing by using 2 dot cards or trick cards
Counting & Subitizing number boss: (divide group into 2 lines) 1. flash dot card to the line leaders 2. 1 st to subitize becomes “boss” and stays at front of the line, opponent goes to end of the line 3. keep flashing dot cards to line leaders (boss & challenger) *practice PERCEPTUAL subitizing by using 2 dot cards or trick cards
Counting & Subitizing: trick cards using 10 frame to practice conceptual subitizing using 10 frame to practice conceptual subitizing
Counting & Comparing What is comparing: determining whether a given number is greater or fewer than another number, as well as its place on the number line Why practice comparing: to determine the reasonableness of a problem’s solution, precursor to estimation skills
Counting & Comparing blobs & bars: present the SAME graph question each day for a week (e.g. Do you have a dog at home?) Students will select their response by choosing the corresponding colored cube (e.g. red cubes for “yes,” blue cubes for “no”)
Counting & Comparing grab bag colors: 1.choose 2 crayons 2.grab color squares from the bag 3.only glue the squares that match the 2 crayons 4. Which color had more squares? How many more? Which color had fewer squares?
Counting & Comparing riddles (using 10 frame cards): “My 10 frame has more than 4 counters, but less than 9.” “My 10 frame has an even number of counters.” “My 10 frame has 1 more than 5 counters.”
Counting & Comparing 10 frame routines: keep several sets of 10 frame cards handy give each student a card, using the cards to: 1.line students up in numerical order 2.divide students into groups (odd, even, >5, <5, same numbers together, etc.) 3.greatest (or least) number takes first turn, etc.
Counting & Comparing war: (divide sets of 10 frame cards between 2 players) 1.players place their own cards face down in a pile 2.players both draw their top card, placing it face up 3.player with the greatest number wins and takes both cards 4.winner must state how he won: “8 is greater than 5”
Counting & Comparing: 1 more, 1 less 1 more, 1 less
Counting & Comparing: more or less number line more or less number line
Making Sets What is a set: a number of objects in a specified group or unit Why practice making sets: Understanding sets involves making and decomposing a set/subset, a precursor to many number operations
Making Sets sets of 5 show a 5 frame filled with 2 different kinds of counters describe the whole set by naming the parts ask questions: How many counters did it take to fill the entire frame? How do you know it was filled? How many red parts? How many yellow parts? Show me how you know. If I had ___ cubes and the whole frame was filled, how many cubes would there be?
Making Sets number bracelets add beads to pipe cleaner bracelets students manipulate beads to decompose that number (1 + 4 = 5; 3 + 2 = 5; 2 +2 +1 =5)
Making Sets weighing numbers decompose a number and compare it to the whole place the whole set (5 purple cubes) on one side of the balance place the decomposed sets (2 red cubes and 3 blue cubes) on the other side of the balance compare each set
Making Sets making dot cards provide students with 21 “garage sale dot” stickers and 6 blank index cards students will create their own dot cards 1-6 to use for games and counting/subitizing practice
Adding & Subtracting What is adding and subtracting: manipulating and set by increasing or decreasing its amount Why practice adding and subtracting: understand how number/amount can be changed in predictable ways