GRADE 2 · ALBERTAOUTCOME AB-G2-2N1
L2 · Even or odd? Grouping by 2s and remainders
Learning goal
“I can tell if a number is even or odd by making groups of 2 and checking what is left over.”
Pair — two things that belong together, like a pair of socks.
Left over — what remains after groups are made, when it cannot fill a whole group.
Worked example
Put 14 socks into pairs. Step 1: Match the socks two at a time: pair, pair, pair... Step 2: Count the pairs: 7 pairs, and every sock is in a pair. Step 3: None is left over. 14 is even.
Check yourself — explain it
14 is even. Why?
Paired problem — example still visible
Put 18 counters in groups of 2. -> 9 groups, none left over. 18 is even.
Faded completion — last step is yours
"12 cubes in groups of 2 make ___ groups. Left over: 0. So 12 is ___." -> 6; even
Ready to practise?
10 scored questions with a 3-rung hint ladder. Mastery needs 8/10 plus both gate questions.