Database
[{"_id":1,"name":"Aurelia Menendez","scores":[{"type":"exam","score":60.06045071030959},{"type":"quiz","score":52.79790691903873},{"type":"homework","score":71.76133439165544},{"type":"homework","score":34.85718117893772}]}]
Query
db.collection.aggregate([{"$unwind":{"path":"$scores"}},{"$sort":{"scores.score":-1}},{"$group":{"_id":"$_id","name":{"$first":"$name"},"scores":{"$push":"$scores"}}}])