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josh kirchner
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Mastery challenges gone! Huge mistake!
I've used this program for 12 years since I taught AP calc and have outstanding results thx to Khan and its videos and practice. Finding out mastery challenges were removed was extremely disappoi...
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Faollik ko’lami 5
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Oxirgi harakat
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hamjamiyati bilan birga
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Oqiyabdi 0 foydalanuvchii
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O’qiyotganlarni 0 foydalanuvchii
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Ovozlar 0
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Obunalar 2
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Faollik ko’lami 5
-
Oxirgi harakat
-
hamjamiyati bilan birga
-
Oqiyabdi 0 foydalanuvchii
-
O’qiyotganlarni 0 foydalanuvchii
-
Ovozlar 0
-
Obunalar 2