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One common educational practice is to chart students' progress over time so that students can see their own improvement. these progress charts often lead to higher student achievement in the absence of other observable forms of reinforcement. the effectiveness of such charts in changing behavior illustrates the role of reinforcement as:

The lifeguard at the local beach record the tides each day the chart below shows the high and low tides over two days

Me with this psychology homework, i’m struggling with it.