According to the Missouri Learning Standards, 1st grade Mathematics instructional time should focus on five critical areas.



Video: Number grid (4: 57 mins)

Video: Binary Numbers (10:33 mins)

Video: Skip counting by 5 example (2:04 mins) 

Video: Counting by tens examples (2:35 mins) 

  • I can count to 120, starting at any number less than 120.

  • I can read and write numerals and represent a number of objects with a written numeral.

  • I can count backward from a given number between 20 and 1.

  • I can count by 5s to 100 starting at any multiple of five.


Video:  Introduction to place value (5:58 mins)

Video:  Place value example with 25 (2;54 mins)

Video:  Place value example with 42 (4:18 mins)

Video:  Understanding place value when adding ones (2:35 mins)

Video:  Understanding place value while adding (3:1

Video:  Equal sign (4:55 mins)

Video:  Greater than and less than symbols (5:03 mins)

  • I can understand that 10 can be thought of as a bundle of 10 ones – called a “ten.”

  • I can understand two-digit numbers are composed of ten(s) and one(s).

  • I can compare two two-digit numbers using the symbols >, = or <.

  • I can count by 10s to 120 starting at any number

  • I can add within 100.

  • I can calculate 10 more or 10 less than a given number mentally without having to count.

  • I can add or subtract a multiple of 10 from another two-digit number, and justify the solution.


Video:  Basic addition (7:42 mins)

Video:  Addition 2 (12:25 mins)

Video:  Addition 3 (8:56 mins)

Video:  Basic Subtraction (8:31 mins)

Video:  Subtraction 2 (12:31 mins)

Video:  Subtraction 3: Introduction to Borrowing or Regrouping (18;25 mins)

Video:  Making 5 (4:05 mins)

Video:  Adding to 10 (1:59 mins)

Video:  Adding 8 + 7 (3:18 mins)

Video:  Adding 7 + 6 (3:52 mins)

Video:  Equal sign (4:55 mins)

Video:  Greater than and less than symbols (5:03 mins)

  • I can use addition and subtraction within 20 to solve problems.

  • I can solve problems that call for addition or three whole numbers whose sum is within 20.

  • I can develop the meaning of the equal sign and determine if equations involving addition and subtraction are true or false. 

  • I can determine the unknown whole number in an addition or subtraction equation relating three whole numbers.

  • I can use properties as strategies to add and subtract.

  • I can demonstrate that subtraction can be solved as an unknown-addend problem.

  • I can add and subtract within 20.

  • I can demonstrate fluency with addition and subtraction within 10.



Video:  Cousin Fal’s shape collection (4:18 mins)

Video:  Recognizing shapes (6:08 mins)

Video:  Compose shapes (2:03 mins)

Video:  Identifying Geometric Solids (3:26 mins)

Video:  Measuring lengths with different units (2:53 mins)

Video:  Measuring lengths 2 (4:30 mins)

Video:  Length word problems (5:49 mins)

Video:  Telling time exercise example 1 (2:50 mins)

Video:  Telling time exercise example 2 (2:15 mins)

Video:  Counting American coins (4:30 mins) 

  • I can distinguish between defining attributes versus non-defining attributes; build and draw shapes.

  • I can compose and decompose two- and three-dimensional shapes to build an understanding or part-whole relationships.

  • I can recognize two- and three dimensional shapes from different perspectives and orientations.

  • I can partition circles and rectangles into two or four equal shares, and describe the shares and the wholes verbally.

  • I can order three or more objects by length.

  • I can compare the lengths of two objects indirectly by using a third object.

  • I can demonstrate the ability to measure length or distance using objects.

  • I can tell and write time in hours and half-hours using analog and digital clocks.

  • I can know the value of a penny, nickel, dime and quarter.



Video:  Count by category (0:43 mins)

Video:  Picture graphs (2:47 mins)

Video:  Reading bar graph examples (2:56 mins)

  • I can collect, organize and represent data with up to three categories.

  • I can draw conclusions from object graphs, picture graphs, T-charts and tallies.

* Source: (Grade Level Expectations (GLEs))