▁by ▁the ▁Est ab lish ment ▁Cla use . ▁It ▁is ▁beyond ▁dispute ▁that , ▁at ▁a ▁minimum , ▁the ▁Constitution ▁guarante es ▁that ▁government ▁may ▁not ▁co er ce ▁anyone ▁to ▁support ▁or ▁particip ate ▁in ▁religion ▁or ▁its ▁exercise , ▁or ▁otherwise ▁act ▁in ▁a ▁way ▁which ▁" est ab lish es ▁a ▁[ state ] ▁religion ▁or ▁religious ▁faith , ▁or ▁tends ▁to ▁do ▁so ." ' As ▁we ▁have ▁observed ▁before , ▁there ▁are ▁height ened ▁concerns ▁with ▁protect ing ▁freedom ▁of ▁conscience ▁from ▁subt le ▁co er ci ve ▁pressure ▁in ▁the ▁elementary ▁and ▁secondary ▁public ▁schools . ▁Our ▁dec isions ▁in ▁[ Eng el ] ▁and ▁[ Ab ington ] ▁recognize , ▁among ▁other ▁things , ▁that ▁prayer ▁exer cis es ▁in ▁public ▁schools ▁carry ▁a ▁particular ▁risk ▁of ▁indirect ▁co erc ion . ▁The ▁concern ▁may ▁not ▁be ▁limited ▁to ▁the ▁context ▁of ▁schools , ▁but ▁it ▁is ▁most ▁pron ounced ▁there . ▁What ▁to ▁most ▁bel ie vers ▁may ▁seem ▁nothing ▁more ▁than ▁a ▁reasonable ▁request ▁that ▁the ▁non bel ie ver ▁respect ▁their ▁religious ▁practices , ▁in ▁a ▁school ▁context ▁may ▁appear ▁to ▁the ▁non bel ie ver ▁or ▁diss enter ▁to ▁be ▁an ▁attempt ▁to ▁employ ▁the ▁mach in ery ▁of ▁the ▁State ▁to ▁en force ▁a ▁religious ▁orth odox y . ▁ ▁Con curr ing ▁opinions ▁ ▁Justice ▁Black mun ' s ▁conc urrence ▁str essed ▁that ▁" our ▁dec isions ▁have ▁gone ▁beyond ▁prohib iting ▁co erc ion , ▁however ,