# Ocean Math Centers

We started our ocean math centers earlier this month with nine skills being explored.

Students figure out numbers according to place value, using tens and ones.

Students match up a number with the corresponding number word and tens frame.

Students count tally marks and record the two-digit number.

Students randomly choose four seashells and place them in order from least to greatest. They then record the numbers.

Students choose a crab and identify and write down the two-digit number. They then record the three numbers that come before that number.

In Number Chomp, students each choose a number. They decide which number is greater and place it inside the alligator’s mouth. The smaller number goes on the other side of the alligator. Students record the information.

Students measure the sea life using nonstandard units and record this information.

Students add sea life and write and solve the corresponding number sentence.

They have had so much fun with these centers, while practicing important grade level skills.

# Subtraction: Dinosaur Style!

We began exploring the concept of subtraction last week using the song Five Green and Speckled Frogs. I had frog volunteers help me sing and act out the song. When it was time to jump into the pond, my helpers jumped back to their spot on the carpet. We revisited the song again today.

We also explored the concept of subtraction using a number line. I made a number line on the floor using blue painters tape and a sharpie. I wrote the numbers 0 through 12.

Next, I gave students a number on which to start and then a number to take away.  The students then had to walk the number line and solve the equation.

This was great practice for the independent Math Journal activity I had planned where students solved subtraction equations independently and recorded their answer.  To add some dinosaur flair, students used a plastic dinosaur to jump backward along the number line.

There was a lot of thinking going on!