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In this video, Marta learns to fill a 10-frame model to solve an addition problem.

In this video, Marta, Alex, Jackson, Daniel and Jada learn how to collect and organize survey data using a simple tally chart.

In this video, Marta uses data collected in a T-chart to make a picture graph displaying her friends' favorite vegetables.

In this video, Marta uses 10-frames to count to 120 by tens.

In this video, Jada and Alex learn to count consecutive numbers on a number chart.

In this video, Daniel learns how to count two-digit numbers using groups of 10 (tens) and lefotver 1s (ones).

In this video, Alex uses place-value blocks to learn how the 10s and 1s place digits increase or decrease as values are added or removed from 2-digit numbers.

In this video, Alex learns how to solve problems by making a list of questions to organize possible answers to find the correct answer.

In this video, Jackson learns how to count hours using the hour and minute hands on a clock.

In this video, Jackson learns how to tell time using the hour and minute hands on a clock.

In this video, Carlos uses a variety of 2-D shapes (triangle, rhombus, square) to solve puzzles involving other geometric shapes.

In this video, Carlos learns the various attributes of the solid figures cone, circle, triangular prism, rectangular prism, and circle.

In this video, Marta learns how to use 10-frames and counters to solve an addition problem.

In this video, Carlos uses addition facts and sentences to solve subtraction problems, and learns that addition facts and subtraction facts are related.

In this video, Jada learns to add two numbers using tens and ones on a hundred chart.

In this video, Daniel learns how to add multiple 2-digit numbers using place value, tens and ones.

In this video, Marta learns how to regroup tens into ones in order to solve subtraction problems.

In this video, Marta learns various ways to subtract 2-digit numbers from 2-digit numbers, including regrouping and marking out.

In this video, Marta learns how to subtract 2-digit numbers using a subtraction frame.

In this video, Carlos learns how to use an organized list and tally marks to solve the problem of how many quarters, dimes and nickels he will need to buy an apple.

In this video, Jada uses the place-value model for hundreds, tens and ones to learn about 3-digit numbers.

In this video, Alex learns how to add 3-digit numbers uses mental math to add hundreds.

In this video, Alex learns to add 3-digit numbers using hundreds and tens.

In this video, Alex uses different models like place-value and regrouping to solve subtraction problems.