I'd say by rounding and similar techniques the answer is 468, though it doesn't say all the needed numbers.
Answer:
Definition of clear objectives of what has to be taught/learnt
"Subject is divided into relatively small learning units. Each unit will have:
objectives (i.e. a clear definition of what has to be mastered");
a brief diagnostic test to be administered before the unit (they may lead to supplementary instruction);
learning materials and instructional strategies;
formative evaluation (that in turn should lead to remediation) and summative evaluation.
Time to learn is adjusted for each student in order to master at least 80% of the material
Assessment whether global objectives have been met.
Explanation:
Hope it is helpful.....
His primary instrument was the piano.
