Third-graders Kendall Haasch (left) and Campbell Thulin concentrate on a math problem on iPads Jan. 8 during class at Pierce Downer Elementary School in Downers Grove. Mark Busch - mbusch@shawmedia.com

Third-graders Kendall Haasch (left) and Campbell Thulin do math problems on iPads Jan. 8 during class at Pierce Downer Elementary School in Downers Grove. Mark Busch - mbusch@shawmedia.com

Third-grade teacher Tracy deBuhr works with students in math small group instruction Jan. 8 during class at Pierce Downer Elementary School in Downers Grove. Mark Busch - mbusch@shawmedia.com

Fifth-graders work on subtracting fractions Jan. 8 during class at Pierce Downer Elementary School in Downers Grove. Mark Busch - mbusch@shawmedia.com

Fifth-graders Lauren Mall (left) and Addie Jankauskas work together on a math problem Jan. 8 during class at Pierce Downer Elementary School in Downers Grove. Mark Busch - mbusch@shawmedia.com