. The ages of pupils and their progress through the elementary grades. QVAfiT^li ^5 ME-b AN /o - 54-yJ aa Ql/AftTILE- 4Zo/, Figure 5 Each horizontal hne represents the slow-progress percentage among all pupilsenrolled in one elementary school system. The schools in this figure are thesame as in figure 6. 27 SLOW i::>t>OG[>BSS r>tfeCEriTAGe5 OP tAJt>\lSbChOOltb tXCLUSIVE-LY Ih OhB- WbUCSCHOOL SYSTtM- 88 COMnV/MITIES feer^fetSEMTEb P&RCtMTAGeS OP- SLOV/ PROCRtSS —• IP lo 3o 40 60 SO TO 8$ 25 Ljo. STOlAtJTILEr- /AlrblA 35«>ov//^fiTll,e 3(Wo

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