Curated OER
Missing Digits (D)
In this missing digit learning exercise, learners fill in the blanks in 22 mixed operation problems on this Halloween themed page. They complete 22 vertical addition, subtraction, multiplication, and division problems.
Curated OER
Maya Math: Addition and Subtraction
Learners examine how ancient Maya counted, and practice addition and subtraction using Maya number glyphs.
Curated OER
"Adding It Up" at James Fort
Students discuss jettons and their archaeological importance at Jamestown. They then practice using historic counting sheets and artifacts to understand the calculating methods of the early 17th Century, and identify their similarities...
T. Smith Publishing
Halloween Add or Subtract Worksheet 1
Twenty-eight subtraction problems are presented using single- or double-digits. Because of a fuzzy bat at the top of the page, this is a Halloween-themed worksheet. Use it as a homework assignment or assessment of subtraction skills.
Curated OER
From Where to Where?
Students find locations based upon their latitude and longitude coordinates. In this latitude and longitude instructional activity, students locate points on a grid and learn how to use an astrolabe.