4 pages total. The focus is identifying the difference between "less than" (subtraction) and "is less than" (inequality).
2 pages of matching an algebraic or variable expression to a written expression. Each spells out a secret phrase which makes it easy for students to self check and easy for teachers to correct.
2 pages of sorting: translating algebraic expressions into written expressions and translating written expressions into algebraic expressions.
I created this for my 7th grade students, but it is adequate for grades 6-8.