Khan Academy
Khan Academy: Count Tens
Practice counting by tens. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Add Using Groups of 10 and 100
Practice making groups of 10 and 100 while adding 3-digit numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Illustrative Mathematics
Illustrative Mathematics: Choral Counting
This can be a daily activity to reinforce learning number sequences. The teacher will need a 100 chart or large number line and a pointer. As a whole group, have young scholars chant the counting sequence starting with one to thirty,...
Math Is Fun
Math Is Fun: Colorable Number Chart
Use this chart to explore counting and number patterns up to 100. Choose from thirty different colors for your paintbrush as well as five different versions of the hundreds chart, or start with a blank chart. There is also an auto color...
Better Lesson
Better Lesson: Smiley Face Number Friends
Second graders will extend their understanding of partners of 10 to partners of 100.