This is a modification of the Helping With Math tasks, "Number Grid Puzzles," https://www.helpingwithmath.com/printables/worksheets/numbers/1nbt4-number-grid-puzzles01.htm. This activity was used with a tier 3 fourth grade intervention math group to help students count by tens in mid-decades and count forward and back by ones. I modified this activity by first having students make observations and note patterns in a hundreds chart; specifically encouraging students to note that counting on by ten ones increased the tens digit by one. Students then modeled this concept with base-ten blocks. Finally, students completed the hundreds chart number puzzles to reinforce this concept and wrote matching equations when a puzzle was solved. For example, "47 = 35 + 12."

This lesson was used with a tier 3 fourth grade intervention math group to help students move from counting by tens and ones separately to counting by tens in mid-decades (for example: 44 + 33, students would count 54, 64, 74, 75, 76, 77). I started this lesson by having students explore the columns of a hundreds chart. Students highlighted one column at a time and recited the counting sequence from top to bottom. We then connected the reciting to matching numeric equations. The next step was to use the counting by mid-decade knowledge to solve addition equations. Students used open number lines to model the addition.

This google slide show organizes place value exercises in a sequence by weeks. Teachers use the slide show with students to promote finding structure and adding and subtracting ones and tens.

In this online game, students will practice counting in sequence from a given number within a hundreds chart.  Students can choose between difficulty levels, which differentiate the number of digits given in the sequence and the number of digits to place within that sequence.

In this online game, students will be given a blank hundreds chart and will be asked to place random numbers into the correct cell within the blank hundreds chart.