Compare two-digit numbers. Use the symbols <, >, and =. You can start with base-ten blocks before comparing written numbers.

Greater than and less than symbols by Khan Academy

Do these Khan Academy exercises:

Conclude by leading this investigation. Here's a partial demonstration. Here's a gentle introduction. Here are answers to some of the questions. Of course, you shouldn't show answers to students until they're done exploring.

When is not equal to introduced by the Common Core?

Conclude by leading this investigation:

Puppet Puzzle (counting, logic, proof)

by MathPickle

1.NBT.B.3: Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.