All students at Boston Grammar School gained three A*-E grades at A-level.
In chemistry, further maths and RS 100 per cent were at A*-B.
Similar results were obtained in English literature, geography and physics - in each of these cases 67 per cent of grade were A*-B.
There were numerous outstanding performances including Mihir Rao (four A* grades), Jeremy Lee (three A* grades), Jason Barnes (three A* and two C grades), Arthur Carr (one A*, two A grades and one B grade), Kieran Weston (A*AB), Matthew Tudball (AAA), James Burr (AABBB) and Hannah Kitchen (AAB).
Mihir will attend University College London to study medicine while Jeremy will pursue a course in Natural Sciences at Durham University.
At AS level there were excellent results for Luke Cocks, Joseph Dean, Bradley Knight, Smilte Matulionyte, Mohanad Turki and Matthew Wearden. Luke and Matthew gained four A grades each at AS level, while Matthew also obtained in A* in A-level maths a year early.
A spokesman: “All of our students are to be congratulated on their success in achieving such superb grades.
“Once again, the partnership between students, teachers and parents has delivered magnificent results.
“It is wonderful to see the hard work and combined efforts for reaping such rewards. Well done to all Boston Grammar School A-level students.”