A Learning Activity is a strategy a teacher chooses to actively
engage students in learning a concept or skill using a digital tool/resource.

You may save this Learning Activity to your hard drive as an .html file by
selecting “File”,then “Save As” from your browser’s
pull down menu. The file name extension must be .html.

Phase:

After/Explain/Elaborate

Activity:

Students will use an internet-connected device to play "10 More Attack."

In the game, they will be given a two-digit number and mentally add 10 more to sink the ships. The students' job is to destroy the robot submarines using depth changes. The only problem is the sonar screen is always off by 10 fathoms, so students will have to add ten to the two-digit number shown.

Students will record each equation in their math journals.

Assessment Strategies:

The teacher will use observation and student recordings to formatively assess students specifically looking for those who are mentally adding 10.

Advanced Preparation:

The teacher needs to provide the link to students.

Students must have an internet-connected device and math journal.

Variation Tips (optional):

Notes or Recommendations (optional):

ALCOS 2019

14. Given a two-digit number, mentally find 10 more or 10 less than the number without having to count, and explain the reasoning used.