Total Score (1) (2 ) (3) (4) (1) Tracking School 0.138 0.175 0.191 0.18 (0.078)* (0.077)** (0.093)** (0.092) (2) In Bottom Half of Initial Distribution -0.036 x Tracking School (0.07) (3) In Bottom Quarter -0.044 x Tracking School (0.08) (4) In Second to Bottom Quarter -0.014 x Tracking School (0.07) (5) In Top Quarter 0.028 x Tracking School (0.08) Initial attainment percentile 0.018 0.02 0.022 (0.001)** * (0.001)*** (0.002)*** Individual Controls no yes yes yes Observations 5796 5282 5282 5282 Total effects on bottom half and bottom quarter Coeff (Row 1)+Coeff (Row 2) 0.155 Coeff (Row 1)+Coeff (Row 3) 0.136