Students will learn how to interpret negative numbers, how to plot them on the number line, and how to read them from a number line.
Intro to negative numbers by Khan Academy
Next, give your students this challenge:
How Many Days? by NRICH
Conclude by leading this investigation:
Full Glass – multiplying fractions
6.NS.C.5: Understand that positive and negative numbers are used together to describe quantities having opposite directions or values (e.g., temperature above/below zero, elevation above/below sea level, credits/debits, positive/negative electric charge); use positive and negative numbers to represent quantities in real-world contexts, explaining the meaning of 0 in each situation.
6.NS.C.6: Understand a rational number as a point on the number line. Extend number line diagrams and coordinate axes familiar from previous grades to represent points on the line and in the plane with negative number coordinates.