Counting
Free lessons and practice worksheets for counting.
Compare & Order Numbers
Students comparing 74 and 47 often focus on the last digits and incorrectly conclude that 74 < 47. Teaching number comparison and ordering builds the foundation for all advanced math concepts, from place value understanding to algebraic inequalities.
3 min readEven & Odd Numbers
Even and odd numbers form the foundation of number sense that second graders encounter in CCSS.2.OA.3. Students who master this concept by age 7 show stronger performance in later algebra topics, as the patterns of even and odd operations mirror algebraic rules.
3 min readRepresent Numbers
A first-grader sees 23 blocks on the table but writes "two-three" instead of "twenty-three." This common scenario highlights why explicit instruction in number representation matters. Students need multiple pathways to understand that 47, "forty-seven," four tens plus seven ones, and 40 + 7 all represent the same quantity.
3 min readSkip Counting
Skip counting transforms how second-graders understand number patterns, moving from tedious one-by-one counting to efficient mathematical reasoning. When students master counting by 2s, 5s, and 10s, they build essential foundations for multiplication tables and place value concepts outlined in CCSS.2.NBT.2 and CCSS.2.OA.3.
3 min read