Love this very visual way to scaffold students' understanding of estimation and build number sense. Students use the containers with 10 and 100 as comparisons to estimate the "mystery number" in the middle container.
Come see how I do my estimation station and find lots more ideas for the day of school in a kindergarten or first grade classroom. This post includes both math and literacy activities for this fun day. You can grab a FREEBIE too!
Magnetic number fishing, they add what they catch! As well as addition, develops hand/eye coordination, fine motor--I love this for magnetic letter fishing too! When they catch a letter, they say its name and sound.