In this lesson, students add a pair of two-digit numbers with varied sums in the ones.

In this lesson, students classify shapes based on defining attributes using examples, variants, and non-examples.

In this lesson, students find and name two-dimensional shapes including trapezoid, rhombus, and a square as special rectangle, based on defining attributes of sides and corners.

In this lesson, students find and name three-dimensional shapes including cone and rectangular prism, based on defining attributes of faces and points.

In this lesson, students recognize halves within a circular clock face and tell time to the half hour.

In this lesson, students recognize halves within a circular clock face and tell time to the half hour.

In this lesson, students solve "compare with bigger or smaller unknown" problem types.

In this lesson, students use the place value chart to record and name tens and ones within a two-digit number up to 100.

In this lesson, students write and interpret two-digit numbers to 100 as addition sentences that combine tens and ones.

In this lesson, students use the symbols >, =, and < to compare quantities and numerals to 100.

In this lesson, students count and write numbers to 120 and use Hide Zero cards to relate numbers 0 to 20 to 100 to 120.

In this lesson, students add a multiple of 10 to any two-digit number within 100.

In this lesson, students add a pair of two-digit numbers when the ones digits have a sum less than or equal to 10.

In this lesson, students add a pair of two-digit numbers when the ones digits have a sum greater than 10 using decomposition.

In this lesson, students add a pair of two-digit numbers when the ones digits have a sum greater than 10 using decomposition.

In this lesson, students add a pair of two-digit numbers when the ones digits have a sum greater than 10 with drawing. Recording the total below.

In this lesson, students add a pair of two-digit numbers when the ones digits have a sum greater than 10 with drawing. Record the new ten below.

In this lesson, students add a pair of two-digit numbers when the ones digits have a sum greater than 10 with drawing. Record the new ten below.

In this lesson, students add a pair of two-digit numbers with varied sums in the ones, and compare the results of different recording methods.